Oh well, we all miss a detail every now and then. But thanks for "infecting" us with all the other stuff you've posted on gauge programming over the last few years.

You are all most welcome! :(

I must admit to being somewhat confused now!!! have I got this right?FSX SP2 is already large address aware and so absolutely does not need the userva line edit? Vista 64 SP1 already has this issue addressed.It is extremely unlikely that the problem is OS related due to the above.Just trying to add to my understanding....... Thx, Mark

FSX SP2 is already large address aware and so absolutely does not need the userva line edit? - Correct as long as the OS is 64bitVista 64 SP1 already has this issue addressed - With FSX SP2, yesIt is extremely unlikely that the problem is OS related due to the above - Correct, assuming the OS/FSX or the addon in use when the OOM appeared is not somehow corrupt from improper hardware setup and use to begin with