I have been trying to combine files, like I have numerous times in the past and it keeps giving me and error that it is unable to complete because I have unsupported files. These are all PDF's, none of them are secure.
Can you help me also, I keep getting the error message - error combining - unsupported files?
I have tried many times and this is a large PDF combined file that I am trying to do - which takes so long to ge organised. I am a new user of this software so any assistance would be greatly appreciated.