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Can't upload a Powerpoint file due to extension mismatch?

4 (talkcontribs)

Hello I am trying to upload a powerpoint to my wiki. The powerpoint has the file type extension .ppt. But, I keep getting this error message: File extension ".ppt" does not match the detected MIME type of the file (application/zip).

Please help me fix this issue. I feel like uploading a presentation file should be simple, but I can't seem to fix this easily.

Bawolff (talkcontribs)

are you sure the extension isnt supposed to be pptx? Try renaming the file to pptx before upload (talkcontribs)

The file was originally a pptm. The site I am uploading to only accepts .ppt, so I used Powerpoint Export to change the file to .ppt and then tried to upload it. As I said above, it still didn't work. I decided to create a blank .ppt file and copy over the slides, and the wiki let me upload this.

Thank you for trying to help! I wish I understood what was wrong with the converted file, but as long as I can share the info, it is fine.

Bawolff (talkcontribs)

Based on your description, it sounds like when you tried to convert it from pptm -> ppt, it only renamed it, and didn't actually convert it. MediaWiki detected it wasn't actually a ppt file so rejected it (pptm & pptx are zip based formats, which is probably why MW is saying it is application/zip. ppt is a much older format, and is not based on zip)

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