Application Loader gives error: Not a valid zip file

Question

I'm trying to submit an app (.ipa) and the only error Application Loader gives is "Not a valid zip file." It doesn't say anything about signatures, provisioning profiles, certificates, or binaries, etc. What is the problem?

Answer 1

If you're emailing the .ipa to your client, make sure it isn't getting munged either by their email software/server or by yours. You may want to zip the .ipa (even though the ipa is already an archive format) in order to get the file to them without it being modified. Then they can unzip it and submit the ipa file. My guess is that the .ipa file suffix isn't being recognized by someone's mail software and that's damaging it somehow.

Answer 2

If your zip file name has a space in it, e.g. My App.zip, try renaming the zip file so that it has no spaces, and try to upload it again. I seem to recall this happening to me once, and this did the trick.