diff --git a/pym/core/core_main.py b/pym/core/core_main.py
index 740b60c..48fd442 100644
--- a/pym/core/core_main.py
+++ b/pym/core/core_main.py
@@ -55,6 +55,7 @@ def core_main():
                        e.message.rpartition(no_module)[2])
             else:
                 print e.message
+            sys.exit(1)
     except KeyboardInterrupt:
         print
         print _("Task interrupted")