- Tools > Personal Books
- Add book
- Fill in title
- Add field > Publisher & Publication Date
- Enter a date
- Add file... (select an appropriate docx file)
- Build Book
- Click "Finished"
- Hover over the entry of the book you just compiled in PB panel
- Click Edit
- Change... (select an image file)
- Build Book
Result:
Build Failed. Could not remove existing resource. Please close all other open panels and try again.
This has happened to me once before, but it's not consistently reproducible. I'm attaching a log file where it happened (I tried it again several times after the failure, so it won't be the last time in this log file. Sorry.)
2475.PBBuildFailure.zip