What type of report are you trying to run? (Legacy or BIRT)
Also where are you trying to run the report from Command line or from the Visual Studio Plugin?
If from command line what command to you use?
For a quicker resolution, I would suggest opening a support ticket with the infromation you provided and the answers to the above questions to help jump start the case. (They may also ask for the FPR and logs from %localappdata%\Fortify)
Here is a handy guide for Micro Focus's Support Process and a walkthrough on the support site: https://www.microfocus.com/media/guide/micro_focus_software_support_guide.pdf
-- Matt Hacker