Running into some troubles with Adobe Acrobat Pro DC and it's ability to combine files (or lack thereof).
When combining any type of files, the Adobe Acrobat software will hang or give the message: "No PDF file was created because Adobe Acrobat encountered an unidentified error."
The funny thing is - the combine function works after I restart the system. This led me to think that it was related to a program I was running. So I tested before and after opening certain software (Microsoft Office, Google Chrome, etc) - the results I got were inconclusive and I was unable to narrow it down to a single program that was causing the issue.
Steps taken to troubleshoot: - Update software - Uninstall Adobe Reader - Repair Install Adobe Acrobat
I decided to do a bit more digging, I analyzed the task manager to see if there were any odd processes running during the combine files lock-up. I didn't find any odd processes, however, I did note that there were multiple Acrobat.exe instances. Ending one of the "running" tasks seems to have allowed the files to be combined.
This is definitely not a fix as it's extremely time consuming to head to the task manager every time I need to combine files. I am not sure why multiple instances are being opened, as there is only one Acrobat application open.