this project is invalid or corrupt and cannot be opened storyline

Hi davidand!

So sorry to hear about your .story file!

A common cause of file corruption is working off of a network, or shared drive, which can introduce network latency. To avoid setbacks like this, we suggest authoring your Storyline content on your local hard drive (typically your C: drive). Also, this article outlines other common causes of file corruption, as well as ways to avoid it.

Smart move, checking your computer's temporary folder for a working back up! This is a helpful tip to keep in mind when running into hiccups like this. Just to confirm, after you located the temporary file, did you change the file extension from .tmp to .story? A temporary file won't open without changing the extension first.

If you're comfortable sharing a copy of the affected project, I'd be happy to take a closer look to confirm it has been corrupted before moving on. Feel free to upload a copy here in the discussion or privately through a support case. Looking forward to hearing from you!