OnCourse Software

I am running into big problem.

Just upgraded to Win 11 this past Sunday.

My simulator is P3dv4.5, and I use both FDC 2011 and PF3-ATC.

PF3 is working fine, but FDC2011 disconnects while running the 3rd checklist for pre-starts.

I have re-installed my FSUIPC 6, and that did not help.


Windows 11 won't even let me drag & drop my log files here to help you out.

I did some further testing.

I generally load PF3 and FDC2011at the beginning of each flight. I connect FDC first and start the checklists.

I found that when I went to connect PF3 usually somewhere between the pushback check list and/or the pre-start check list, that as soon as I hit "connect" on PF 3 that was when FDC would disconnect.

This anomaly has only been since the upgrade to Win 11.

I have already rolled back to Windows 10 where the two programs worked together without the one suffering a dropped connection.

So what happens if you start PF3 first?