diff --git a/test/.gitignore b/test/.gitignore
index 231965af..e775fd0e 100644
--- a/test/.gitignore
+++ b/test/.gitignore
@@ -23,3 +23,4 @@ T_main_*
 trick
 jitlib
 build
+S_sie.json
\ No newline at end of file
diff --git a/test/SIM_demo_inputfile/RUN_test/unit_test.py b/test/SIM_demo_inputfile/RUN_test/unit_test.py
index 1bf67a48..c8349721 100644
--- a/test/SIM_demo_inputfile/RUN_test/unit_test.py
+++ b/test/SIM_demo_inputfile/RUN_test/unit_test.py
@@ -1,5 +1,5 @@
 
-execfile("RUN_test/input.py")
+exec(open("RUN_test/input.py").read())
 
 # Disable real-time (if applicable)
 trick.real_time_disable()
diff --git a/test/SIM_demo_sdefine/RUN_test/unit_test.py b/test/SIM_demo_sdefine/RUN_test/unit_test.py
index 42adb51b..26ac5436 100644
--- a/test/SIM_demo_sdefine/RUN_test/unit_test.py
+++ b/test/SIM_demo_sdefine/RUN_test/unit_test.py
@@ -1,4 +1,4 @@
-execfile("RUN_test/input.py")
+exec(open("RUN_test/input.py").read())
 
 # Disable real-time (if applicable)
 trick.real_time_disable()
diff --git a/test/SIM_test_dp/Modified_data/data_record.py b/test/SIM_test_dp/Modified_data/data_record.py
index 6c39ce07..c179492c 100644
--- a/test/SIM_test_dp/Modified_data/data_record.py
+++ b/test/SIM_test_dp/Modified_data/data_record.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/group1.dr")
-execfile("Modified_data/group2.dr")
-execfile("Modified_data/group3.dr")
-execfile("Modified_data/group4.dr")
+exec(open("Modified_data/group1.dr").read())
+exec(open("Modified_data/group2.dr").read())
+exec(open("Modified_data/group3.dr").read())
+exec(open("Modified_data/group4.dr").read())
diff --git a/test/SIM_test_dp/RUN_test/input.py b/test/SIM_test_dp/RUN_test/input.py
index de526b03..70fe11d5 100644
--- a/test/SIM_test_dp/RUN_test/input.py
+++ b/test/SIM_test_dp/RUN_test/input.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/data_record.py")
+exec(open("Modified_data/data_record.py").read())
 
 
 trick.sim_services.exec_set_terminate_time(10.0)
diff --git a/test/SIM_test_dp/RUN_test/unit_test.py b/test/SIM_test_dp/RUN_test/unit_test.py
index e42a8641..1c76adc6 100644
--- a/test/SIM_test_dp/RUN_test/unit_test.py
+++ b/test/SIM_test_dp/RUN_test/unit_test.py
@@ -1,5 +1,5 @@
 
-execfile("RUN_test/input.py")
+exec(open("RUN_test/input.py").read())
 
 # Disable real-time (if applicable)
 trick.real_time_disable()
diff --git a/test/SIM_test_dr/RUN_test/unit_test.py b/test/SIM_test_dr/RUN_test/unit_test.py
index 55ce074d..eaeac821 100644
--- a/test/SIM_test_dr/RUN_test/unit_test.py
+++ b/test/SIM_test_dr/RUN_test/unit_test.py
@@ -1,7 +1,7 @@
-execfile("Modified_data/dr_typesASCII.dr")
-execfile("Modified_data/dr_typesBINARY.dr")
-execfile("Modified_data/dr_bitfASCII.dr")
-execfile("Modified_data/dr_bitfBINARY.dr")
+exec(open("Modified_data/dr_typesASCII.dr").read())
+exec(open("Modified_data/dr_typesBINARY.dr").read())
+exec(open("Modified_data/dr_bitfASCII.dr").read())
+exec(open("Modified_data/dr_bitfBINARY.dr").read())
 
 trick_utest.unit_tests.enable() ;
 trick_utest.unit_tests.set_file_name( os.getenv("TRICK_HOME") + "/trick_test/SIM_test_dr.xml" ) ;
diff --git a/test/SIM_test_ip/Modified_data/nested_includes.py b/test/SIM_test_ip/Modified_data/nested_includes.py
index da125bc1..f703d8ac 100644
--- a/test/SIM_test_ip/Modified_data/nested_includes.py
+++ b/test/SIM_test_ip/Modified_data/nested_includes.py
@@ -1,2 +1,2 @@
 
-execfile("Modified_data/next_level.py")
+exec(open("Modified_data/next_level.py").read())
diff --git a/test/SIM_test_sched/RUN_test/input.py b/test/SIM_test_sched/RUN_test/input.py
index 05b61679..5bc21807 100644
--- a/test/SIM_test_sched/RUN_test/input.py
+++ b/test/SIM_test_sched/RUN_test/input.py
@@ -1,6 +1,6 @@
 
-#execfile("Modified_data/data_record.dr")
-#execfile("Modified_data/realtime.py")
+#exec(open("Modified_data/data_record.dr").read())
+#exec(open("Modified_data/realtime.py").read())
 
 my_integ_loop.getIntegrator(trick.Runge_Kutta_4, 2)
 trick.sim_services.exec_set_terminate_time(300.0)
diff --git a/test/SIM_threads/RUN_test/overrun.py b/test/SIM_threads/RUN_test/overrun.py
index ceb89d32..c90f0781 100644
--- a/test/SIM_threads/RUN_test/overrun.py
+++ b/test/SIM_threads/RUN_test/overrun.py
@@ -1,5 +1,5 @@
 
-execfile("RUN_test/input.py")
+exec(open("RUN_test/input.py").read())
 
 print '\nFinding number of CPUs...'
 os.system('cat /proc/cpuinfo | grep processor')
diff --git a/test/SIM_threads/RUN_test/unit_test.py b/test/SIM_threads/RUN_test/unit_test.py
index 9da5fee4..d5fff404 100644
--- a/test/SIM_threads/RUN_test/unit_test.py
+++ b/test/SIM_threads/RUN_test/unit_test.py
@@ -1,5 +1,5 @@
 
-execfile("RUN_test/overrun.py")
+exec(open("RUN_test/overrun.py").read())
 
 # Disable real-time (if applicable)
 trick.real_time_disable()
diff --git a/trick_sims/Ball/SIM_ball_L1/RUN_test/input.py b/trick_sims/Ball/SIM_ball_L1/RUN_test/input.py
index f2dd6a09..461cbce4 100644
--- a/trick_sims/Ball/SIM_ball_L1/RUN_test/input.py
+++ b/trick_sims/Ball/SIM_ball_L1/RUN_test/input.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 #my_integ_loop.integ_sched.integ_ptr = trick.getIntegrator( trick.Runge_Kutta_2, 4, 1.0);
 my_integ_loop.getIntegrator(trick.Runge_Kutta_2, 4)
diff --git a/trick_sims/Ball/SIM_ball_L1/RUN_test/unit_test.py b/trick_sims/Ball/SIM_ball_L1/RUN_test/unit_test.py
index 133999f2..f6f0b24a 100644
--- a/trick_sims/Ball/SIM_ball_L1/RUN_test/unit_test.py
+++ b/trick_sims/Ball/SIM_ball_L1/RUN_test/unit_test.py
@@ -1,5 +1,5 @@
 
-execfile("RUN_test/input.py")
+exec(open("RUN_test/input.py").read())
 
 # Disable real-time (if applicable)
 trick.real_time_disable()
diff --git a/trick_sims/Ball/SIM_ball_L2/RUN_control/input.py b/trick_sims/Ball/SIM_ball_L2/RUN_control/input.py
index 48e25815..bdb7b5c4 100644
--- a/trick_sims/Ball/SIM_ball_L2/RUN_control/input.py
+++ b/trick_sims/Ball/SIM_ball_L2/RUN_control/input.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/data_record.dr").read())
 
 
 trick.sim_services.exec_set_terminate_time(300.0)
diff --git a/trick_sims/Ball/SIM_ball_L2/RUN_realtime/input.py b/trick_sims/Ball/SIM_ball_L2/RUN_realtime/input.py
index 9d8f7c75..5fe75106 100644
--- a/trick_sims/Ball/SIM_ball_L2/RUN_realtime/input.py
+++ b/trick_sims/Ball/SIM_ball_L2/RUN_realtime/input.py
@@ -1,7 +1,7 @@
 
-execfile("Modified_data/data_record.dr")
-execfile("Modified_data/realtime.py")
-execfile("Modified_data/graphics.py")
+exec(open("Modified_data/data_record.dr").read())
+exec(open("Modified_data/realtime.py").read())
+exec(open("Modified_data/graphics.py").read())
 
 trick.sim_services.exec_set_terminate_time(300.0)
 
diff --git a/trick_sims/Ball/SIM_ball_L2/RUN_test/input.py b/trick_sims/Ball/SIM_ball_L2/RUN_test/input.py
index 48e25815..bdb7b5c4 100644
--- a/trick_sims/Ball/SIM_ball_L2/RUN_test/input.py
+++ b/trick_sims/Ball/SIM_ball_L2/RUN_test/input.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/data_record.dr").read())
 
 
 trick.sim_services.exec_set_terminate_time(300.0)
diff --git a/trick_sims/Ball/SIM_ball_L2/RUN_test/unit_test.py b/trick_sims/Ball/SIM_ball_L2/RUN_test/unit_test.py
index 88e880f9..f647e219 100644
--- a/trick_sims/Ball/SIM_ball_L2/RUN_test/unit_test.py
+++ b/trick_sims/Ball/SIM_ball_L2/RUN_test/unit_test.py
@@ -1,5 +1,5 @@
 
-execfile("RUN_test/input.py")
+exec(open("RUN_test/input.py").read())
 
 # Disable real-time (if applicable)
 trick.real_time_disable()
diff --git a/trick_sims/Ball/SIM_ball_L3/RUN_control/input.py b/trick_sims/Ball/SIM_ball_L3/RUN_control/input.py
index c9f5e25f..ec3da0c2 100644
--- a/trick_sims/Ball/SIM_ball_L3/RUN_control/input.py
+++ b/trick_sims/Ball/SIM_ball_L3/RUN_control/input.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/data_record.dr").read())
 
 
 ball2.state.input.mass = trick.sim_services.attach_units("kg" , 10.0)
diff --git a/trick_sims/Ball/SIM_ball_L3/RUN_realtime/input.py b/trick_sims/Ball/SIM_ball_L3/RUN_realtime/input.py
index 83aef5fa..d4e03565 100644
--- a/trick_sims/Ball/SIM_ball_L3/RUN_realtime/input.py
+++ b/trick_sims/Ball/SIM_ball_L3/RUN_realtime/input.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/data_record.dr")
-execfile("Modified_data/realtime.py")
-execfile("Modified_data/graphics.py")
+exec(open("Modified_data/data_record.dr").read())
+exec(open("Modified_data/realtime.py").read())
+exec(open("Modified_data/graphics.py").read())
 
diff --git a/trick_sims/Ball/SIM_ball_L3/RUN_test/input.py b/trick_sims/Ball/SIM_ball_L3/RUN_test/input.py
index 4747f624..9b17bfa2 100644
--- a/trick_sims/Ball/SIM_ball_L3/RUN_test/input.py
+++ b/trick_sims/Ball/SIM_ball_L3/RUN_test/input.py
@@ -1,6 +1,6 @@
 
-execfile("Modified_data/data_record.dr")
-execfile("Modified_data/auto_test.dr")
+exec(open("Modified_data/data_record.dr").read())
+exec(open("Modified_data/auto_test.dr").read())
 
 ball.altimeter.input.add_noise = False
 ball2.altimeter.input.add_noise = False
diff --git a/trick_sims/Ball/SIM_ball_L3/RUN_test/unit_test.py b/trick_sims/Ball/SIM_ball_L3/RUN_test/unit_test.py
index 3eb22c04..676b66e8 100644
--- a/trick_sims/Ball/SIM_ball_L3/RUN_test/unit_test.py
+++ b/trick_sims/Ball/SIM_ball_L3/RUN_test/unit_test.py
@@ -1,4 +1,4 @@
-execfile("RUN_test/input.py")
+exec(open("RUN_test/input.py").read())
 
 # Disable real-time (if applicable)
 trick.real_time_disable()
diff --git a/trick_sims/Cannon/SIM_amoeba/RUN_test/input.py b/trick_sims/Cannon/SIM_amoeba/RUN_test/input.py
index d67f915a..a372d5ce 100644
--- a/trick_sims/Cannon/SIM_amoeba/RUN_test/input.py
+++ b/trick_sims/Cannon/SIM_amoeba/RUN_test/input.py
@@ -1,6 +1,6 @@
 
-execfile("Modified_data/cannon_aero.dr")
-execfile("Modified_data/amoeba.py")
+exec(open("Modified_data/cannon_aero.dr").read())
+exec(open("Modified_data/amoeba.py").read())
 
 trick.mc_set_enabled(1)
 trick.mc_set_num_runs(70)
diff --git a/trick_sims/Cannon/SIM_amoeba/RUN_test/unit_test.py b/trick_sims/Cannon/SIM_amoeba/RUN_test/unit_test.py
index 316cc737..e88b575a 100644
--- a/trick_sims/Cannon/SIM_amoeba/RUN_test/unit_test.py
+++ b/trick_sims/Cannon/SIM_amoeba/RUN_test/unit_test.py
@@ -6,7 +6,7 @@ if trick.mc_get_slave_id() == 0:
     trick_utest.unit_tests.enable();
     trick_utest.unit_tests.set_file_name( os.getenv("TRICK_HOME") + "/trick_test/SIM_amoeba.xml" )
 
-execfile("Modified_data/amoeba.py")
+exec(open("Modified_data/amoeba.py").read())
 
 trick.mc_set_enabled(1)
 #trick.mc_set_dry_run(1)
diff --git a/trick_sims/Cannon/SIM_cannon_aero/RUN_curveball/input.py b/trick_sims/Cannon/SIM_cannon_aero/RUN_curveball/input.py
index 980ad12c..22931c33 100644
--- a/trick_sims/Cannon/SIM_cannon_aero/RUN_curveball/input.py
+++ b/trick_sims/Cannon/SIM_cannon_aero/RUN_curveball/input.py
@@ -1,4 +1,4 @@
-execfile("Modified_data/cannon_aero.dr")
+exec(open("Modified_data/cannon_aero.dr").read())
 
 dyn.baseball.pos[0] = 16.0
 dyn.baseball.pos[1] = 0.1
diff --git a/trick_sims/Cannon/SIM_cannon_aero/RUN_fastball/input.py b/trick_sims/Cannon/SIM_cannon_aero/RUN_fastball/input.py
index d49da8f7..9f24ec2e 100644
--- a/trick_sims/Cannon/SIM_cannon_aero/RUN_fastball/input.py
+++ b/trick_sims/Cannon/SIM_cannon_aero/RUN_fastball/input.py
@@ -1,4 +1,4 @@
-execfile("Modified_data/cannon_aero.dr")
+exec(open("Modified_data/cannon_aero.dr").read())
 
 dyn.baseball.pos[0] = 16.0
 dyn.baseball.pos[1] = 0.1
diff --git a/trick_sims/Cannon/SIM_cannon_analytic/RUN_graphics/input.py b/trick_sims/Cannon/SIM_cannon_analytic/RUN_graphics/input.py
index 43988b1a..0c7ec4e2 100644
--- a/trick_sims/Cannon/SIM_cannon_analytic/RUN_graphics/input.py
+++ b/trick_sims/Cannon/SIM_cannon_analytic/RUN_graphics/input.py
@@ -1,4 +1,4 @@
-execfile("Modified_data/realtime.py")
+exec(open("Modified_data/realtime.py").read())
 
 #==========================================
 # Start the display VarServer Client
diff --git a/trick_sims/Cannon/SIM_cannon_analytic/RUN_test/input.py b/trick_sims/Cannon/SIM_cannon_analytic/RUN_test/input.py
index 2d2a78e6..33a0535e 100644
--- a/trick_sims/Cannon/SIM_cannon_analytic/RUN_test/input.py
+++ b/trick_sims/Cannon/SIM_cannon_analytic/RUN_test/input.py
@@ -1,5 +1,5 @@
-execfile("Modified_data/cannon.dr")
-execfile("Modified_data/realtime.py")
+exec(open("Modified_data/cannon.dr").read())
+exec(open("Modified_data/realtime.py").read())
 
 trick.exec_set_terminate_time(5.2)
 
diff --git a/trick_sims/Cannon/SIM_cannon_eulercromer/RUN_test/input.py b/trick_sims/Cannon/SIM_cannon_eulercromer/RUN_test/input.py
index 1e679d7b..9215d897 100644
--- a/trick_sims/Cannon/SIM_cannon_eulercromer/RUN_test/input.py
+++ b/trick_sims/Cannon/SIM_cannon_eulercromer/RUN_test/input.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/cannon.dr")
+exec(open("Modified_data/cannon.dr").read())
 dyn_integloop.getIntegrator(trick.Euler_Cromer, 4)
 dyn_integloop.integ_sched.set_verbosity( 1)
 trick.exec_set_terminate_time(5.2)
diff --git a/trick_sims/Cannon/SIM_cannon_eulercromer/RUN_test/unit_test.py b/trick_sims/Cannon/SIM_cannon_eulercromer/RUN_test/unit_test.py
index 78fb3a53..b2a281b4 100644
--- a/trick_sims/Cannon/SIM_cannon_eulercromer/RUN_test/unit_test.py
+++ b/trick_sims/Cannon/SIM_cannon_eulercromer/RUN_test/unit_test.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/cannon.dr")
+exec(open("Modified_data/cannon.dr").read())
 dyn_integloop.getIntegrator(trick.Euler_Cromer, 4)
 #dyn.my_integ.set_verbosity( 1)
 trick.exec_set_terminate_time(5.2)
diff --git a/trick_sims/Cannon/SIM_cannon_jet/RUN_curveball/input.py b/trick_sims/Cannon/SIM_cannon_jet/RUN_curveball/input.py
index 980ad12c..22931c33 100644
--- a/trick_sims/Cannon/SIM_cannon_jet/RUN_curveball/input.py
+++ b/trick_sims/Cannon/SIM_cannon_jet/RUN_curveball/input.py
@@ -1,4 +1,4 @@
-execfile("Modified_data/cannon_aero.dr")
+exec(open("Modified_data/cannon_aero.dr").read())
 
 dyn.baseball.pos[0] = 16.0
 dyn.baseball.pos[1] = 0.1
diff --git a/trick_sims/Cannon/SIM_cannon_jet/RUN_fastball/input.py b/trick_sims/Cannon/SIM_cannon_jet/RUN_fastball/input.py
index d49da8f7..9f24ec2e 100644
--- a/trick_sims/Cannon/SIM_cannon_jet/RUN_fastball/input.py
+++ b/trick_sims/Cannon/SIM_cannon_jet/RUN_fastball/input.py
@@ -1,4 +1,4 @@
-execfile("Modified_data/cannon_aero.dr")
+exec(open("Modified_data/cannon_aero.dr").read())
 
 dyn.baseball.pos[0] = 16.0
 dyn.baseball.pos[1] = 0.1
diff --git a/trick_sims/Cannon/SIM_cannon_jet/RUN_jet_read/input.py b/trick_sims/Cannon/SIM_cannon_jet/RUN_jet_read/input.py
index 053c243b..d1fcd9b6 100644
--- a/trick_sims/Cannon/SIM_cannon_jet/RUN_jet_read/input.py
+++ b/trick_sims/Cannon/SIM_cannon_jet/RUN_jet_read/input.py
@@ -1,4 +1,4 @@
-execfile("Modified_data/cannon_aero.dr")
+exec(open("Modified_data/cannon_aero.dr").read())
 
 dyn.baseball.pos[0] = 16.0
 dyn.baseball.pos[1] = 0.1
diff --git a/trick_sims/Cannon/SIM_cannon_numeric/RUN_graphics/input.py b/trick_sims/Cannon/SIM_cannon_numeric/RUN_graphics/input.py
index 66897bb8..d35ff140 100644
--- a/trick_sims/Cannon/SIM_cannon_numeric/RUN_graphics/input.py
+++ b/trick_sims/Cannon/SIM_cannon_numeric/RUN_graphics/input.py
@@ -1,4 +1,4 @@
-execfile("Modified_data/realtime.py")
+exec(open("Modified_data/realtime.py").read())
 
 #==========================================
 # Start the Cannonball Graphics Client
diff --git a/trick_sims/Cannon/SIM_cannon_numeric/RUN_test/input.py b/trick_sims/Cannon/SIM_cannon_numeric/RUN_test/input.py
index e56bcb45..20e2a266 100644
--- a/trick_sims/Cannon/SIM_cannon_numeric/RUN_test/input.py
+++ b/trick_sims/Cannon/SIM_cannon_numeric/RUN_test/input.py
@@ -1,2 +1,2 @@
-execfile("Modified_data/realtime.py")
-execfile("Modified_data/cannon.dr")
+exec(open("Modified_data/realtime.py").read())
+exec(open("Modified_data/cannon.dr").read())
diff --git a/trick_sims/Cannon/SIM_monte/RUN_test/gauss.py b/trick_sims/Cannon/SIM_monte/RUN_test/gauss.py
index aad62624..b2f52ebb 100644
--- a/trick_sims/Cannon/SIM_monte/RUN_test/gauss.py
+++ b/trick_sims/Cannon/SIM_monte/RUN_test/gauss.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/cannon_aero.dr")
+exec(open("Modified_data/cannon_aero.dr").read())
 
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 6)
 
diff --git a/trick_sims/Cannon/SIM_monte/RUN_test/inline.py b/trick_sims/Cannon/SIM_monte/RUN_test/inline.py
index 835fd71d..c0be712a 100644
--- a/trick_sims/Cannon/SIM_monte/RUN_test/inline.py
+++ b/trick_sims/Cannon/SIM_monte/RUN_test/inline.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/cannon_aero.dr")
+exec(open("Modified_data/cannon_aero.dr").read())
 
 trick.mc_set_enabled(1)
 #trick.mc_set_dry_run(1)
diff --git a/trick_sims/SIM_msd/RUN_critdamp/input.py b/trick_sims/SIM_msd/RUN_critdamp/input.py
index dbad25fe..4bf921f2 100644
--- a/trick_sims/SIM_msd/RUN_critdamp/input.py
+++ b/trick_sims/SIM_msd/RUN_critdamp/input.py
@@ -1,5 +1,5 @@
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 4)
-execfile("Modified_data/realtime.py")
+exec(open("Modified_data/realtime.py").read())
 
 dyn.msd.b = 2*(2**(0.5))
 
diff --git a/trick_sims/SIM_msd/RUN_nodamp/input.py b/trick_sims/SIM_msd/RUN_nodamp/input.py
index bbb30c2d..774aabc9 100644
--- a/trick_sims/SIM_msd/RUN_nodamp/input.py
+++ b/trick_sims/SIM_msd/RUN_nodamp/input.py
@@ -1,5 +1,5 @@
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 4)
-execfile("Modified_data/realtime.py")
+exec(open("Modified_data/realtime.py").read())
 
 dyn.msd.b = 0
 
diff --git a/trick_sims/SIM_msd/RUN_overdamp/input.py b/trick_sims/SIM_msd/RUN_overdamp/input.py
index 9d62bbe3..d6b3a882 100644
--- a/trick_sims/SIM_msd/RUN_overdamp/input.py
+++ b/trick_sims/SIM_msd/RUN_overdamp/input.py
@@ -1,5 +1,5 @@
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 4)
-execfile("Modified_data/realtime.py")
+exec(open("Modified_data/realtime.py").read())
 
 dyn.msd.b = 4*(2**(0.5)) - 1/2
 
diff --git a/trick_sims/SIM_msd/RUN_test/input.py b/trick_sims/SIM_msd/RUN_test/input.py
index 8ee3b0db..ef081416 100644
--- a/trick_sims/SIM_msd/RUN_test/input.py
+++ b/trick_sims/SIM_msd/RUN_test/input.py
@@ -1,6 +1,6 @@
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 4)
 trick.var_debug(3)
-execfile("Modified_data/realtime.py")
+exec(open("Modified_data/realtime.py").read())
 
 #==========================================
 # Start the display VarServer Client
diff --git a/trick_sims/SIM_msd/RUN_underdamp/input.py b/trick_sims/SIM_msd/RUN_underdamp/input.py
index 1ced0935..f54132c2 100644
--- a/trick_sims/SIM_msd/RUN_underdamp/input.py
+++ b/trick_sims/SIM_msd/RUN_underdamp/input.py
@@ -1,5 +1,5 @@
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 4)
-execfile("Modified_data/realtime.py")
+exec(open("Modified_data/realtime.py").read())
 
 dyn.msd.b = 0.5
 
diff --git a/trick_sims/SIM_parachute/RUN_Baumgartner_jump/input.py b/trick_sims/SIM_parachute/RUN_Baumgartner_jump/input.py
index c1d2e1ba..c46f5f4f 100644
--- a/trick_sims/SIM_parachute/RUN_Baumgartner_jump/input.py
+++ b/trick_sims/SIM_parachute/RUN_Baumgartner_jump/input.py
@@ -1,5 +1,5 @@
 
-execfile("Modified_data/parachutist.dr")
+exec(open("Modified_data/parachutist.dr").read())
 trick.TMM_reduced_checkpoint(0)
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 2)
 
diff --git a/trick_sims/SIM_rocket/RUN_test/input.py b/trick_sims/SIM_rocket/RUN_test/input.py
index dc5ca720..b4424ff6 100644
--- a/trick_sims/SIM_rocket/RUN_test/input.py
+++ b/trick_sims/SIM_rocket/RUN_test/input.py
@@ -1,4 +1,4 @@
-execfile("Modified_data/Rocket.dr")
-#execfile("Modified_data/realtime.py")
+exec(open("Modified_data/Rocket.dr").read())
+#exec(open("Modified_data/realtime.py").read())
 
 trick.exec_set_terminate_time(20.0)
diff --git a/trick_sims/SIM_sat2d/RUN_test/input.py b/trick_sims/SIM_sat2d/RUN_test/input.py
index 2efa69b2..03aeff11 100644
--- a/trick_sims/SIM_sat2d/RUN_test/input.py
+++ b/trick_sims/SIM_sat2d/RUN_test/input.py
@@ -1,5 +1,5 @@
-execfile("Modified_data/realtime.py")
-execfile("Modified_data/satellite.dr")
+exec(open("Modified_data/realtime.py").read())
+exec(open("Modified_data/satellite.dr").read())
 
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 6)
 
diff --git a/trick_sims/SIM_satellite/RUN_test/input.py b/trick_sims/SIM_satellite/RUN_test/input.py
index 772a3f70..c79335bb 100644
--- a/trick_sims/SIM_satellite/RUN_test/input.py
+++ b/trick_sims/SIM_satellite/RUN_test/input.py
@@ -1,7 +1,7 @@
 import os
 
-execfile("Modified_data/realtime.py")
-#execfile("Modified_data/Satellite.dr")
+exec(open("Modified_data/realtime.py").read())
+#exec(open("Modified_data/Satellite.dr").read())
 
 dyn_integloop.getIntegrator(trick.Runge_Kutta_4, 18)
 
diff --git a/trick_sims/SIM_sun/RUN_Summer/input.py b/trick_sims/SIM_sun/RUN_Summer/input.py
index 04546d95..4f74a43e 100644
--- a/trick_sims/SIM_sun/RUN_Summer/input.py
+++ b/trick_sims/SIM_sun/RUN_Summer/input.py
@@ -6,15 +6,15 @@ trick.add_external_application(simControlPanel)
 
 RECORD_DATA = True
 if RECORD_DATA:
-    execfile("Modified_data/helios.dr")
+    exec(open("Modified_data/helios.dr").read())
 
 REALTIME = False
 if REALTIME:
-    execfile("Modified_data/realtime.py")
+    exec(open("Modified_data/realtime.py").read())
 
 JAPANESE = False
 if JAPANESE:
-    execfile("Modified_data/Japanese_labels_alt.py")
+    exec(open("Modified_data/Japanese_labels_alt.py").read())
 
 STRIPCHART = False
 if STRIPCHART:
diff --git a/trick_sims/SIM_sun/RUN_Winter/input.py b/trick_sims/SIM_sun/RUN_Winter/input.py
index b4c5dd4b..859ec297 100644
--- a/trick_sims/SIM_sun/RUN_Winter/input.py
+++ b/trick_sims/SIM_sun/RUN_Winter/input.py
@@ -6,15 +6,15 @@ trick.add_external_application(simControlPanel)
 
 RECORD_DATA = True
 if RECORD_DATA:
-    execfile("Modified_data/helios.dr")
+    exec(open("Modified_data/helios.dr").read())
 
 REALTIME = False
 if REALTIME:
-    execfile("Modified_data/realtime.py")
+    exec(open("Modified_data/realtime.py").read())
 
 JAPANESE = False
 if JAPANESE:
-    execfile("Modified_data/Japanese_labels_alt.py")
+    exec(open("Modified_data/Japanese_labels_alt.py").read())
 
 STRIPCHART = False
 if STRIPCHART:
diff --git a/trick_sims/SIM_sun/RUN_test/input.py b/trick_sims/SIM_sun/RUN_test/input.py
index fe1e64ed..5a6f08df 100644
--- a/trick_sims/SIM_sun/RUN_test/input.py
+++ b/trick_sims/SIM_sun/RUN_test/input.py
@@ -7,15 +7,15 @@ trick.add_external_application(simControlPanel)
 
 RECORD_DATA = True
 if RECORD_DATA:
-    execfile("Modified_data/helios.dr")
+    exec(open("Modified_data/helios.dr").read())
 
 REALTIME = True
 if REALTIME:
-    execfile("Modified_data/realtime.py")
+    exec(open("Modified_data/realtime.py").read())
 
 JAPANESE = False
 if JAPANESE:
-    execfile("Modified_data/Japanese_labels_alt.py")
+    exec(open("Modified_data/Japanese_labels_alt.py").read())
 
 STRIPCHART = False
 if STRIPCHART:
diff --git a/trick_sims/SIM_sun/RUN_test/unit_test.py b/trick_sims/SIM_sun/RUN_test/unit_test.py
index de9de242..5284209c 100644
--- a/trick_sims/SIM_sun/RUN_test/unit_test.py
+++ b/trick_sims/SIM_sun/RUN_test/unit_test.py
@@ -1,4 +1,4 @@
-execfile("RUN_test/input.py")
+exec(open("RUN_test/input.py").read())
 
 # Disable real-time (if applicable)
 trick.real_time_disable()
diff --git a/trick_sims/SIM_wheelbot/RUN_test/input.py b/trick_sims/SIM_wheelbot/RUN_test/input.py
index 7d1678dd..a416a67c 100644
--- a/trick_sims/SIM_wheelbot/RUN_test/input.py
+++ b/trick_sims/SIM_wheelbot/RUN_test/input.py
@@ -1,5 +1,5 @@
-execfile("Modified_data/realtime.py")
-execfile("Modified_data/vehicleState.dr")
+exec(open("Modified_data/realtime.py").read())
+exec(open("Modified_data/vehicleState.dr").read())
 
 trick.TMM_reduced_checkpoint(0)
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_abm.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_abm.py
index 60181080..32f5029a 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_abm.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_abm.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_beeman.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_beeman.py
index 54d89c66..d157f731 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_beeman.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_beeman.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_euler.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_euler.py
index a74ad78a..34ee414d 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_euler.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_euler.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_euler_cromer.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_euler_cromer.py
index 143f0490..d3ec95e8 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_euler_cromer.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_euler_cromer.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_mm4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_mm4.py
index 16511854..ce57d0cf 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_mm4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_mm4.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_nl2.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_nl2.py
index 0ba78cf6..48f01c2a 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_nl2.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_nl2.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_position_verlet.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_position_verlet.py
index 34516f47..d7912ae7 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_position_verlet.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_position_verlet.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk2.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk2.py
index b69f5c64..2fc98237 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk2.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk2.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk2_midpoint.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk2_midpoint.py
index cb39d844..47b442b1 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk2_midpoint.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk2_midpoint.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk4.py
index ea7856f4..2b4e187b 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rk4.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkf45.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkf45.py
index 17429937..d71b6113 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkf45.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkf45.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkf78.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkf78.py
index 21ec8232..d9a1c02f 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkf78.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkf78.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkg4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkg4.py
index 1f364f56..d097f6e8 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkg4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_rkg4.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_velocity_verlet.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_velocity_verlet.py
index 6dd69c33..22c94686 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_velocity_verlet.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/er7_velocity_verlet.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_abm.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_abm.py
index a4b6f9bd..52e334de 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_abm.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_abm.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_beeman.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_beeman.py
index 976df0a3..91c22cd2 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_beeman.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_beeman.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_euler.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_euler.py
index 46b8d3b0..78088819 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_euler.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_euler.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_euler_cromer.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_euler_cromer.py
index 35cdc987..63763d1c 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_euler_cromer.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_euler_cromer.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_mm4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_mm4.py
index 93c3a5a4..2a37d362 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_mm4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_mm4.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_nl2.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_nl2.py
index 3823d822..7f53a743 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_nl2.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_nl2.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_position_verlet.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_position_verlet.py
index 9110c1fd..07dd6eb1 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_position_verlet.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_position_verlet.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk2.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk2.py
index 31be5992..62b8aa80 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk2.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk2.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk2_midpoint.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk2_midpoint.py
index fca6eda6..140bbe80 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk2_midpoint.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk2_midpoint.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk4.py
index 2c92a694..83615c86 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rk4.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkf45.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkf45.py
index 5c8ea121..d8f3a5ed 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkf45.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkf45.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkf78.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkf78.py
index f995b118..0f39ce88 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkf78.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkf78.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkg4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkg4.py
index ee58de4c..0979ce44 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkg4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_rkg4.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_velocity_verlet.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_velocity_verlet.py
index 7aa5cc5b..3e30ebd5 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_velocity_verlet.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_er7_velocity_verlet.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_abm.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_abm.py
index 3b60c34d..73fb4d82 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_abm.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_abm.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_euler.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_euler.py
index 6a57d1a2..8bff75bc 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_euler.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_euler.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_euler_cromer.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_euler_cromer.py
index 65dad1bf..aad3fde8 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_euler_cromer.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_euler_cromer.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_mm4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_mm4.py
index df5f6fae..caa75d6b 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_mm4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_mm4.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_nl2.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_nl2.py
index 3e096115..892ffc9a 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_nl2.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_nl2.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rk2.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rk2.py
index 19f034de..5dadf394 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rk2.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rk2.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rk4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rk4.py
index b26ad290..c0e556af 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rk4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rk4.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkf45.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkf45.py
index b457ae95..7d42082d 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkf45.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkf45.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkf78.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkf78.py
index fbf7b96f..c6ec94bd 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkf78.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkf78.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkg4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkg4.py
index 09f55794..e11782f1 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkg4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/long_trick_rkg4.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_abm.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_abm.py
index 949c9554..776ef3b0 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_abm.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_abm.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_euler.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_euler.py
index acc3d7e9..a8ccf1e3 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_euler.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_euler.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_euler_cromer.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_euler_cromer.py
index 783dd6c5..fe855309 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_euler_cromer.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_euler_cromer.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_mm4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_mm4.py
index 71dff9bb..19bd416b 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_mm4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_mm4.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_nl2.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_nl2.py
index df9104dc..7ff5b869 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_nl2.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_nl2.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rk2.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rk2.py
index 738559d5..91d6b403 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rk2.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rk2.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rk4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rk4.py
index 5ff4bb75..73287903 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rk4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rk4.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkf45.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkf45.py
index dd50709b..a4278604 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkf45.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkf45.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkf78.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkf78.py
index bb3e16f6..86a61b46 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkf78.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkf78.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkg4.py b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkg4.py
index 4138aa9c..465423be 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkg4.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/RUN_test/trick_rkg4.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/long_template.py b/trick_source/er7_utils/sims/SIM_ball_L1/long_template.py
index 1ba2d1f6..2757c13e 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/long_template.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/long_template.py
@@ -1,7 +1,7 @@
 
 # This one of several ways to include files from the input file
-# execfile("Modified_data/auto_test.dr")
-# execfile("Modified_data/data_record.dr")
+# exec(open("Modified_data/auto_test.dr").read())
+# exec(open("Modified_data/data_record.dr").read())
 
 ball.state.input.print_off = 1
 
diff --git a/trick_source/er7_utils/sims/SIM_ball_L1/short_template.py b/trick_source/er7_utils/sims/SIM_ball_L1/short_template.py
index 5660a65e..429b528c 100644
--- a/trick_source/er7_utils/sims/SIM_ball_L1/short_template.py
+++ b/trick_source/er7_utils/sims/SIM_ball_L1/short_template.py
@@ -2,8 +2,8 @@
 # $Id: input.py 1973 2011-10-11 15:11:16Z lin $
 
 # This one of several ways to include files from the input file
-execfile("Modified_data/auto_test.dr")
-execfile("Modified_data/data_record.dr")
+exec(open("Modified_data/auto_test.dr").read())
+exec(open("Modified_data/data_record.dr").read())
 
 # Set the freeze frame rate
 trick.exec_set_freeze_frame(0.10)