Wim Soldaat

John, I will do this and test the results. Thanks a lot, Wim

John, thank you for your quick response. But, I am sorry to say, this all goes far beyond my capabilities as a simple user. Today I flew the PMDG 737 at FL380 on STD QNH. Reported ALT via IVAO Webeye was 36850 ft. Local QNH was 1005 HPA, climbed to FL380 in cockpit, but IVAO still reported me too low. To get to the correct FL on IVAO I had to lower the QNH to 980 HPA (and climb again). So until a simple sollution is found I am stuck checking my altitude via IVAO and adjust accordingly. Or fly an incorrect FL on STD. Or go back to X-plane. Kind regards, Wim

Dear John and Nuno, I have the same msfs altitude problem when on IVAO and have read this topic with interest. How can I use this simvar/code in FSUIPC? I have FSUIPC7 and WIDEFS. I appreciate all your efforts!