When you are using Workshare/Literia Compare, you get the error message that ndOffice doesn’t allow zero-size documents.
When you look at the document, it contains no data, so I am guessing this is a Workshare Issue. I have figured a workaround.
Step 1: Save As Choose either a comparison document (pdf) or Word Document with Track Changes
Step 2: Choose one of the Attach options and not Save a New Document.
The Save as new document is causing the issue.
You will now see the Comparison under the Attachments Section in NetDocuments.