It has been quite a few months since I flew the PMDG 747-8. But when I use the PMDG fuel loader, select "Apply" and select "okay", I return to the cockpit view and I get a fatal error. This is happens at the KSFO flightbeam add on airport, and only happens when I use the PDMG Fuel loader. I tried it at FSDreamteam KJFK and KLAX, but did not get a fatal error, but it happens constantly at the Flightbeam KSFO airport. I use Windows 7. Any possible reasons that my be causing this and why at Flightbeam KFSO?

Correction,  the fatal error occurs with KSFO Blue Print.  I deleted the Blue Print KSFO airport and installed Flightbeam.  Flightbeam seemed to stop the fatal error.  I had flight beam a few years ago and deleted it and installed Blue Print.  I got mixed up which is which that was causing the problem.