We have paths and file names with special characters: L:\Path\MATT'S ADDN BLK 1,2,&3.TIF. I know this is a terrible thing to do, but it was done long ago before my time here. My guess is it is due to the special characters.
The paths are stored in an attribute and I am using that as a hyperlink in a custom popup. The ones which do not have special characters of course open fine. But I get the following error below on the ones that do. Hitting Yes does nothing.
This is not a problem in using the ArcMap hyperlink (lighting bolt).