WD2go error "The document cannot be opened because it is corrupted or damaged." when opening PDF

WD2go giving error “The document cannot be opened because it is corrupted or damaged.” when opening PDF.  I can open PDF files from the same directory and that are larger in size.  Version of WD2go is 2.0.1.

Have you tried with multiple files or just one?

I have several thousand files and it very random as to which files will give the error.