Dear lorinkundert,
Thanks for your inquiry.
The Pro Spire.Doc doesn't have any limitation. But for Free Spire.Doc, it has a general limitation to 500 paragraphs and 25 tables when loading and creating a Word file and a limitation to 3 pages when converting to PDF or XPS files. In addition, all fixes and new features are only included into commercial version.
For your issue, I firstly suggest you use the latest
Spire.Doc Pack Version:5.9. If the issue still exists, please provide input file and the code you were using for testing.
Sincerely,
Betsy
E-iceblue support team