SOLUTION FOUND: Any time a Sage 50 update is installed, which requires a conversion of the database, make sure that in addition to resetting your Crystal Reports User Security Settings, that you also click on the "Install Sage 50 Data Functions" link to the right of the screen. This will update the u2lpeach.dll file with the new Sage 50 Data Functions, which directly impacts Crystal Reports. After doing this, I have now found that Crystal Reports which use the GETPEACH file (this accesses the u2lpeach.dll file), now appear to be operating correctly.