You type in a path and file name into Acrobat, you get this:
Apparently, this is because Acrobat is too "stupid" to append the ".pdf" to your information.
For example, if you type "C:\Temp\MyPDF", you get the error.
If you type "C:\Temp\MyPDF.pdf" instead, no error.
Am I the only one who thinks this is stupid?