--- src/kernel/sel4/src/api/syscall.c
+++ src/kernel/sel4/src/api/syscall.c
@@ -325,7 +325,7 @@ handleReply(void)
     }
 
     case cap_null_cap:
-        userError("Attempted reply operation when no reply cap present.");
+//        userError("Attempted reply operation when no reply cap present.");
         return;
 
     default: