Hi,After launching the NGX in a multiplayer once, quitting the sim and restarting the MP Session results in a CTD every time "JOIN" is clicked to actually launch the 3D world.It requires a restart of the computer to be able to re-join a MP sesion with the NGX after the first connection.I have also suffered a crash due to TCAS in MP environment. It crashed in PMDG_Options_3.DLL (if I have the module name correct) but unfortunately I didn't get the crash details. I'll post again if I see it.Generally the NGX works fine in an MP environment.

Problem signature:  Problem Event Name:	APPCRASH  Application Name:	fsx.exe  Application Version:	10.0.61637.0  Application Timestamp:	46fadb14  Fault Module Name:	ntdll.dll  Fault Module Version:	6.1.7601.17514  Fault Module Timestamp:	4ce7ba58  Exception Code:	c015000f  Exception Offset:	000845c1  OS Version:	6.1.7601.2.1.0.256.48  Locale ID:	1033

Best regards,Robin.

If I END FLIGHT and try and re-join, I get this crash:

Problem signature:  Problem Event Name:    APPCRASH  Application Name:    fsx.exe  Application Version:    10.0.61637.0  Application Timestamp:    46fadb14  Fault Module Name:    window.dll  Fault Module Version:    10.0.61637.0  Fault Module Timestamp:    46fadb59  Exception Code:    c0000005  Exception Offset:    0000c4a3  OS Version:    6.1.7601.2.1.0.256.48  Locale ID:    1033

Best regards,Robin.