Another visual Python tracing tool: https://sites.google.com/site/codeinvestigator/ BTW, this is not a web app. Scroll to the bottom, click on links, then click on install instructions. -- Sincerely, Chris Calloway http://nccoos.org/Members/cbc office: 3313 Venable Hall phone: (919) 599-3530 mail: Campus Box #3300, UNC-CH, Chapel Hill, NC 27599