Pete,
As you have suggested in your ReadMe, I am posting a copy of this message to Microsoft.
A buddy and I use Flight Simulator in multiplayer mode nearly every weekend. We have used the FS9 version of GPSOut successfully with several GPS tracking applications for at least a year. Our weekend multiplayer sessions were the primary use of GPSOut. We expected the FSX version to be trouble-free.
To avoid problems, we don't run firewall software or virus scanners while FS is running.
Here's what we did this weekend:
Purchased FSUIPC 4.02 from SimMarket, downloaded it, and installed it. Started FSX and registered FSUIPC. Connected the FSX computer to a laptop's serial port. I ran Delorme Street Atlas on my laptop, and my buddy ran Topo USA on his laptop. Restarted FSX, and used FSUIPC's dialog to activate GPSOut. We selected the same communication options that we had used in the FS9 version. Street Atlas and Topo USA detected the signal from GPSOut and correctly tracked the plane's movements. We were encouraged. Each of us switched FSX to Multiplayer mode. My buddy hosted, and I joined via direct IP address. As we flew around, Street Atlas and Topo USA continued to get data from GPSOut, but now the data failed to contain updates of the plane's position. GPSOut was repeatedly sending the last known position from the previous FreeFlight mode. Went back to FreeFlight mode and resumed flying. Problem was still there. Data continued to flow, but the plane's position did not update in Street Atlas or Topo USA. The symptoms were identical on both systems. Shut down FSX, and then restarted it (in FreeFlight mode). GPSOut began sending correctly updated data again. Switched FSX to Multiplayer mode, and the problem reappeared for both of us.
While troubleshooting the problem, we discovered that the site where we bought FSUIPC did not have the latest version (FSUIPC 4.026), so we downloaded 4.026 and installed it.
We started FSX in FreeFlight mode. This time, GPSOut didn't even send a signal to Street Atlas or Topo USA at all. Nothing, zip, nada. Neither application detected a GPS signal.
GPSOut was one of our main reasons for buying FSUIPC for FSX, and it's crucial for it to work in multiplayer mode.
Any suggestions on how we can get it working?
MK