I was working on a file and if I tried to save this file, I kept getting this error:-

Click image for larger version.  Name: error.png  Views: 145  Size: 5.8 KB  ID: 82461

I could save any other file that was open, but not the one I happened to be working on.

Eventually decided to shut down the file anyway and tried to open it again. It was just a blank page.

Fortunately, because of the 'auto-backup' feature (thank God, or should it be Xara!) I was able to recover almost 99.9% of the work and it wasn't a real problem in that sense.

But, just thought I would post the error here in case it proves to be useful to the developers.