Combining 3 pdf files failure, why?

Hi meechelle my bell,

There are various reasons why combining PDFs may fail. Let's see if any of these match your situation:

• One or more of the files is a format that PDF Pack doesn't support: Acrobat.com Help | Adobe PDF Pack FAQ
• The files exceed the 100 MB file size limit.
• There are firewall or proxy settings on your computer that limit or prevent uploading files to the Internet.

Are you able to combine other files? Or two of the three files?

Best,
Sara