On Fri, Apr 28, 2017 at 12:04 PM, Yip, Kin <kinyip at bnl.gov> wrote: >> I've tried to do : >> "c:\program files\python36\pythonw.exe" -m idlelib mypythoncodes.py Change this to use "python.exe" and run it from a command prompt. This way you can see the traceback if an exception is raised.