I am having the same issue. At 10.0, I did successfully integrate Python CGIs using arcpy and implemented a number of applications with that approach. We're migrating to 10.1 and concurrently I'm trying to update my CGI scripts, but they've been failing too, with a 502 error. However, when I swap out my cgiFieldStorage() variables with hardcoded variables, the scripts run\output as they should. If you get an update or solution regarding this issue, I'd love to hear about it. Thanks, Eric
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