hm..no work...new kind of crash Faulting application name: fsx.exe, version: 10.0.61472.0, time stamp: 0x475e17d3Faulting module name: xuipc.dll, version: 10.0.61261.0, time stamp: 0x4695574eException code: 0xc0000005Fault offset: 0x0005b2b5Faulting process id: 0x874Faulting application start time: 0x01cc81f0ab8f08b6Faulting application path: C:\Microsoft Flight Simulator X\fsx.exeFaulting module path: C:\Microsoft Flight Simulator X\xuipc.dllReport Id: 619d5726-ede8-11e0-aee4-90e6ba575470

MAybe you can try download en instal all c++ versions. (2005,2008,2010)

Exactly this works!! With the Hotfix 4 and all recend C++ Versions, the Transponder-switch is synced with IvAp (just if you are connected to the network).Thank you very much!

Nice to hear it works!!!

Hi, I checked: I already had all versions of visual C++ and I still got TCAS "bug". Regarding IVAP crashes, still a nightmare, 8 crashes last nite in a 2h40 flight.

Im running ivap in external mode with the first multi pc option checkec in ivap config.And check for windows updates

Hi, I'm not in a multi pc configuration and Win7-64 is uptodate. Moreover, I thought until last nite that there was a link with the amount of trafic in the TCAS, but last nite there was no traffic in the area.

I have also not a multi pc setup but setting ivap in multi pc config