We are experincing the same problem that was identified by a previous posting in this forum, which is associated with post #248123.
The following message is returned in an exception "Number must be not less than 1 in this format" when we try to convert a Word 97-2033 document to MHTML.
Posting 28331 indicates that this issue has been resolved for saving to PDF.
We tried to save as PDF and receive the same exception.
If this issue was resolved in the past, can you please identify what can be done to resolve this issue?