I tried changing the .NET Framework target for our app to version 4.5. The PDF export problem still occurs.
We run Windows Server 2012 R2 x64 (recently migrated to new servers with a clean install); however, this issue also occurs on a Windows 7 Pro x64 development machine. The report does not export to PDF correctly on the server nor the development machine. I just tried IE, Firefox, and Chrome in both environments--same issue for all three browsers.
With all that in mind, it's possible that this problem occurs only for machines on which the .NET Framework 4.6+ is installed. I haven't tried uninstalling the .NET framework 4.6 because that seems like a big project considering dependent applications and everything else that could go wrong. Do you know if the CR dev team can export to PDF on machines running .NET framework 4.6+? Has that been tested? Microsoft has dropped support for .NET Framework 4.5.1 and below, except v3.5.
Please let me know if I can help with anything else.
Thanks, Ludek.