[KevinH]

That debug.txt file will keep being added to every time PageEdit is run when that environment variable is set.

So there are many different debug.txt outputs mixed in that file. Unfortunately, too many to tell what is going on.

So would you please delete debug.txt to clear it Then run the case of latest calibre and latest PageEdit (debug version). Saying no at the popup. Once complete rename debug.txt to broken.txt. That will effectively clear debug.txt.

Then please try again with a working calibre version and our debug PageEdit, saying no at that popup and rename that debug,txt file to working.txt.

Then please post both broken.txt and working.txt here.

Thanks!