diff --git a/Makefile b/Makefile
index 2ede0f32..18d5fdee 100644
--- a/Makefile
+++ b/Makefile
@@ -144,10 +144,12 @@ ICG_EXE := ${TRICK_HOME}/bin/trick-ICG
 # 1 Build Trick-core and Trick Data-products.
 all: no_dp webserver dp
 	@ echo ; echo "Trick compilation complete:" ; date
-
+#ifeq ($(TRICK_OFFLINE), 1)
+#all: copy_offline
 ifeq ($(USE_JAVA), 1)
 all: java
 endif
+#endif
 
 #-------------------------------------------------------------------------------
 # 1.1 Build Trick-core
@@ -214,7 +216,7 @@ dp: ${TRICK_HOME}/trick_source/trick_utils/units
 #
 .PHONY: webserver
 webserver: ${TRICK_LIB_DIR}/libmongoose.a ${TRICK_HOME}/include/mongoose/mongoose.h
-	@ $(MAKE) -C ${TRICK_HOME}/trick_source/web/HttpServer
+	$(MAKE) -C ${TRICK_HOME}/trick_source/web/HttpServer
 
 #-------------------------------------------------------------------------------
 TRICK_ICG_EXCLUDE += ${TRICK_HOME}/include/mongoose
@@ -225,31 +227,51 @@ mongoose.h:
 mongoose.c:
 	curl --retry 4 -O https://raw.githubusercontent.com/cesanta/mongoose/6.16/mongoose.c
 
+${TRICK_LIB_DIR}/libmongoose.a: ${TRICK_HOME}/include/mongoose/mongoose.h | mongoose.o $(TRICK_LIB_DIR)
+	ar crs $@ mongoose.o
+	@ rm mongoose.o
+	@ rm -f mongoose.h
+	@ echo ; echo "Mongoose library compiled:" ; date
+
+ifeq (${TRICK_OFFLINE}, 0)
+
 mongoose.o: mongoose.h mongoose.c
 	$(CC) $(TRICK_CFLAGS) -c -o mongoose.o mongoose.c
-	rm mongoose.c
-
-${TRICK_LIB_DIR}/libmongoose.a: mongoose.o ${TRICK_HOME}/include/mongoose/mongoose.h | $(TRICK_LIB_DIR)
-	ar crs $@ mongoose.o
-	rm mongoose.o
-	rm mongoose.h
-	@ echo ; echo "Mongoose library compiled:" ; date
+	@ rm mongoose.c
 
 ${TRICK_HOME}/include/mongoose/mongoose.h: mongoose.h | ${TRICK_HOME}/include/mongoose
 	@ cp mongoose.h $@
 
+else
+
+# if trick-offline gets updated, we should rebuild libmongoose
+${TRICK_LIB_DIR}/libmongoose.a: ${TRICK_HOME}/trick-offline/mongoose.h ${TRICK_HOME}/trick-offline/mongoose.c
+
+mongoose.o: trick-offline/mongoose.h trick-offline/mongoose.c
+	$(CC) $(TRICK_CFLAGS) -c -I${TRICK_HOME}/trick-offline -o mongoose.o trick-offline/mongoose.c
+
+${TRICK_HOME}/include/mongoose/mongoose.h: trick-offline/mongoose.h | ${TRICK_HOME}/include/mongoose
+	@ cp ${TRICK_HOME}/trick-offline/mongoose.h $@
+endif
+
 ${TRICK_HOME}/include/mongoose: 
 	@ mkdir $@
 
 #-------------------------------------------------------------------------------
 # 1.3 Build Trick's Java Tools
+
+ifeq (${TRICK_OFFLINE}, 0)
 java:
 	@ $(MAKE) -C ${TRICK_HOME}/trick_source/java
 
 .PHONY: javadoc
 javadoc:
 	@ $(MAKE) -C ${TRICK_HOME}/trick_source/java $@
-
+else
+java: | ${TRICK_HOME}/trick-offline
+	mkdir ${TRICK_HOME}/libexec/trick/java/build
+	cp ${TRICK_HOME}/trick-offline/*.jar ${TRICK_HOME}/libexec/trick/java/build
+endif
 #-------------------------------------------------------------------------------
 # 1.4 This target builds the Trick Documentation.
 .PHONY: doxygen
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 7e23af95..63758bab 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -158,6 +158,9 @@ AC_DEFUN([AX_JAVA],[
                   [USE_JAVA="1"]
                  )
     AC_SUBST([USE_JAVA])
+
+
+
     AS_IF([test "$USE_JAVA" = "1"],[
         AC_PROG_AWK
         AX_PROG_JAVA_CC(javac)
@@ -167,8 +170,10 @@ AC_DEFUN([AX_JAVA],[
          [AC_MSG_RESULT([no])
           AC_MSG_ERROR([Trick requires javac version >= 1.8])
          ])
-        AC_PATH_PROG(MVN, mvn, nomvn)
-        AS_IF([test "$ac_cv_path_MVN" = "nomvn"],AC_MSG_ERROR([could not find maven]),[])
+        AS_IF([test "$TRICK_OFFLINE" = "0"], [
+          AC_PATH_PROG(MVN, mvn, nomvn)
+          AS_IF([test "$ac_cv_path_MVN" = "nomvn"],AC_MSG_ERROR([could not find maven]),[])
+        ], [])
      ],[])
 ])
 
@@ -285,6 +290,17 @@ AC_ARG_ENABLE([32bit],
 )
 AC_SUBST([TRICK_FORCE_32BIT])
 
+# If offline is specified, set some compilation flags
+AC_ARG_ENABLE([offline],
+  AS_HELP_STRING([--enable-offline], [Compile Trick in offline mode. Un-tar the trick-offline directory in TRICK_HOME to use this feature]),
+  AS_IF([test "x$enable_offline" = xyes],
+    [TRICK_OFFLINE="1"], 
+    [TRICK_OFFLINE="0"]
+  ),
+  [TRICK_OFFLINE="0"]
+)
+AC_SUBST([TRICK_OFFLINE])
+
 dnl look for programs we need to compile and run
 AC_PROG_AWK
 AC_PROG_CC
diff --git a/configure b/configure
index bd294854..0722e342 100755
--- a/configure
+++ b/configure
@@ -674,6 +674,7 @@ ac_ct_CC
 CFLAGS
 CC
 AWK
+TRICK_OFFLINE
 TRICK_FORCE_32BIT
 LIBXML
 X_LIB_DIR
@@ -743,6 +744,7 @@ ac_user_opts='
 enable_option_checking
 with_x
 enable_32bit
+enable_offline
 with_swig
 enable_java
 with_llvm
@@ -1402,6 +1404,9 @@ Optional Features:
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --enable-32bit          Force Trick and sims to compile 32bit
+  --enable-offline        Compile Trick in offline mode. Un-tar the
+                          trick-offline directory in TRICK_HOME to use this
+                          feature
   --enable-java           use java (default is yes)
   --enable-er7utils       use er7_utils (default is yes)
 
@@ -3835,6 +3840,22 @@ fi
 
 
 
+# If offline is specified, set some compilation flags
+# Check whether --enable-offline was given.
+if test "${enable_offline+set}" = set; then :
+  enableval=$enable_offline; if test "x$enable_offline" = xyes; then :
+  TRICK_OFFLINE="1"
+else
+  TRICK_OFFLINE="0"
+
+fi
+else
+  TRICK_OFFLINE="0"
+
+fi
+
+
+
 for ac_prog in gawk mawk nawk awk
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
@@ -5912,6 +5933,9 @@ else
 fi
 
 
+
+
+
     if test "$USE_JAVA" = "1"; then :
 
         for ac_prog in gawk mawk nawk awk
@@ -6110,7 +6134,9 @@ $as_echo "no" >&6; }
 
   fi
 
-        # Extract the first word of "mvn", so it can be a program name with args.
+        if test "$TRICK_OFFLINE" = "0"; then :
+
+          # Extract the first word of "mvn", so it can be a program name with args.
 set dummy mvn; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -6151,12 +6177,14 @@ $as_echo "no" >&6; }
 fi
 
 
-        if test "$ac_cv_path_MVN" = "nomvn"; then :
+          if test "$ac_cv_path_MVN" = "nomvn"; then :
   as_fn_error $? "could not find maven" "$LINENO" 5
 fi
 
 fi
 
+fi
+
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
diff --git a/libexec/trick/pm/launch_java.pm b/libexec/trick/pm/launch_java.pm
index 76aa8f44..08d003a1 100644
--- a/libexec/trick/pm/launch_java.pm
+++ b/libexec/trick/pm/launch_java.pm
@@ -46,7 +46,6 @@ sub launch_java($$) {
        $command .= "$_ ";
     }
 
-    print($command);
     system $command ;
     exit $? >> 8 ;
 }
diff --git a/share/trick/makefiles/config_user.mk.in b/share/trick/makefiles/config_user.mk.in
index c0f7c6b9..54b4e957 100644
--- a/share/trick/makefiles/config_user.mk.in
+++ b/share/trick/makefiles/config_user.mk.in
@@ -16,6 +16,8 @@ MVN    = @MVN@
 USE_JAVA = @USE_JAVA@
 JAVAC  = @JAVA_CC@
 
+TRICK_OFFLINE = @TRICK_OFFLINE@
+
 USE_X_WINDOWS = @USE_X_WINDOWS@
 
 LLVM_HOME = @LLVM_HOME@
diff --git a/trick_source/java/Makefile b/trick_source/java/Makefile
index 24abea92..146cce0f 100644
--- a/trick_source/java/Makefile
+++ b/trick_source/java/Makefile
@@ -12,5 +12,5 @@ javadoc:
 	${MVN} javadoc:javadoc
 
 clean:
-	@${MVN} -q clean -Dcmake=false
+	rm -rf ${JAVA_BUILD_DIR}
 	@echo java build directory cleaned.