When I attempt to combine PDF files, I get the following message: " Acrobat does not support the conversion of one or more of your files to PDF. Please remove these files or go to settings and choose the PDF Portfolio option." The Portfolio option wi

Hi Themrgshow,

As you have mentioned, you are trying to combine multiple Adobe Illustrator files into single PDF.

We have tried to replicate the issue and can combine files to single PDF without any issues.

Please try to open all the files in Acrobat and then try to combine them to single PDF.

If you are still experiencing the issue, please let us know the exact workflow you do to combine PDF.

What is the current version of the application? Identify the product and its version for Acrobat and Reader DC

Are you on Windows machine or Mac? What is the OS version?

Would it be possible to share the files that you are trying to combine? How to share a file using Adobe Document Cloud

You may share your files in a private message. To initiate a private message, take help of the steps provided here How Do I Send Private Message

Let us know how it goes.

We will be waiting for your response.

Regards,

Meenakshi