Hi, Just loading up everthing...new PC + FSX etc. Prepared a flight plan and saved it. However am getting the message "Run Time Error 5 Invalid Call or Argument". Would appreciate advice please. Thanks in inticipation.x(

when does it happen?did you rebuild the scenery database?are you running rc v4.3? fsuipc 4.x?jd

Thanks for your response JD. When does it happen - Immediately when I try to load a FP that I had prepared earlier using the FSX flight planner ...a simple plan really just to try various things in FSX. Interestingly though, there is one older plan in there from an earlier copy of FSX (ex old PC) and that does load....I've looked at both and cannot see anything different mmmm!Scenery Database. I'm sure that I had rebuilt but did again just now and it didn't change anything.Versions - Yes, I'm running rc4 4.2.3831 and FSUIPC v4.09.Don S

version 4.2 of rc will not work with fsxyou have to upgrade to v4.3jd

Oops! Yes your absolutely right..sorry, I had downloaded v4.3 but had a mental block. My excuse is old age.... Thanks JD - everything is now working fine. Don S:-)