A few other options suggested in this discussion are to use the “Acrobat Advanced” option and to use the “Convert to PDF” menu option. If not using Acrobat Advanced, see Using the “Convert to PDF” menu option on Windows and Mac and Using the “Convert to PDF” menu item in Photoshop or Acrobat Pro on Adobe Reader. As for the error message, check your Acrobat Reader .jar files and if there are no errors, and the “Add to PDF” menu is not displaying, then it's likely that there is a bug in the program. Round 1: first three docs on list had “Error during processing (file skipped)” messages and last two processed without problems (2/2 split) My first three pages all show “Combining files error” and I think that's not normal. Is Acrobat reading the info from the last document in the list or am I missing something? The error occurred on pages “01-12-08 00:08.MPD”, “01-12-08 02:05.MPD” and “01-12-08 11:20.MPD” Also, on page 12 is another similar error. How do these error messages occur, and why do a couple of pages show the same error each time? I tried combining all three documents from the same page, each time getting the exact same error. I tried combining all three docs from the same page, each time getting the exact same error. Furthermore, I tried all 3 documents (one is only in JPEG format) on different pages, but every time it produced the same error. And that was on a page without errors, so I'm assuming I didn't get the “No PDF file was created because Acrobat encountered an unidentified error” error. For the other error message, I added a different blank in the first line and also the “No PDF File was created because Acrobat encountered an unidentified error” one. The end result of those three files combined in Acrobat 8.9 is: This is a better picture of the error, but what about the rest of the documents? Are there many errors? More questions on the errors: I'm assuming you didn't get the error on the first two pages of this list.