diff --git a/tracewin b/tracewin
index dfc5a133950c16e2ef387862d949d6e49a8a000e..531153b9dd90c2496391f30ae71a90495801066f 100644
--- a/tracewin
+++ b/tracewin
@@ -78,8 +78,8 @@ if args.outpath:
 if args.seed:
     cmd.append("random_seed="+str(args.seed))
 
-print args.run
+print ' '.join(cmd)
 if args.run:
-    subprocess.call(cmd)
-else:
-    print ' '.join(cmd)
+    # TraceWin gives error when using subprocess.call (both for shell equals True and False)
+    #subprocess.call(cmd)
+    os.system(" ".join(cmd))