Error Importing aup file

I am having the same trouble. I try to open an aup. file I’ve been working on for days and Audacity says “error importing, use File > Open to open aup. file”, which I’m doing but it still gives this error message. The data is in the same place as the project - on my desktop. Please, somebody help fix this problem for me. Thank you!

Which version of Windows?
Which version of Audacity? (look in “Help > About Audacity”)

Attach the .AUP file to your reply so that we can check it. See here for how to attach a file to your post: