Hope someone can help.
I have built a WIG in URWIGO, played it through in the URWIGO emulator and saved the gwz file. Uploaded to Wherigo.com and it is on the site and in my list of WIGs. I clicked Edit to add the description and check the boxes for 'Make this cartridge available in the directory' and 'Cartridge is active'. When I click "Save Cartridge Details" , I get
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For your (future) reference, here are some things that, in my experience, have caused/cause issues.
Line breaks and newlines that are not properly encoded.
HTML.
Command with the name "Debug".
Total file size exceeding 20MB.
Using setmetatable/getmetatable.
Having text in your cartridge that looks like a C# package name (I read about this; haven't checked in detail yet.)