Saved keynote document could not be read. Error message says The document does not have a valid format.

Using Keynote '09 on an iMac OS 10.8.4. Two of my students saved a Keynote file then the next day when trying to open received an error message- The document "4b Molly.key" could not be read. The document does not have a valid format. The students are saving correctly. Any ideas how we can retrieve a working file? Why did this happen?

Just tagging on as I encounted this problem this morning.  I'm using Mavericks, on MBP (late 2013). 
Have both Keynote 5 and 6 - tried to open the file in both, to no avail.   I have also tried the renaming of .key to .zip that seemed to work for others with previous OS, but does not fix now.  Also tried uploading to iCloud, renaming, redownloading - no fix there either.  I've tried to open on iPad and on a different user's iMac - again, get the same error.
It worked yesterday and the day before.  It is a large file; however, I realized that from last night to this morning the only different thing I did was that I inserted photos in the keynote deck by drag & drop verses Insert/Choose and wondering if this corrupted the file.
I'm going to hope a fix is out there somewhere and that I don't have to spend hours upon days upon weeks redoing this 98+ page deck.
Any suggestions?

Similar Messages

Maybe you are looking for