I can't see any errors in the logs explaining why this would be the case.
Does it happen with all Zip files, or just this particular one?
Is the Zip file over 20MB? If so it won't like that. Maybe try splitting it into smaller files and see if we can identify the problem?
If the zip file isn't too huge, please could you email it to support@cambridgeopensystems.com and I'll see if I can reproduce the problem on our test site.
Thanks
Voice Admin
It might be useful to state the maximum ZIP file size in the documentation.
Good suggestion, I've added details of the maximum upload size into the documentation, and ensured that Voicebot is fully trained on this matter!
For reference, the maximum upload size for any file on Voice is 100MB.
(It used to be 20MB back when storage space was much more expensive!)
Thanks
Joe