Boy, This one's quite the mystery. I tried a few more things with no success but here also are more details about my system
OS: Win98SE, Full Install
FS2004: Includes patch to 9.1, not installed in default folder, Is in
c:\games\FS2004
Also, I must admit I'm using the No CD patch, I bought FS2004, I just hate having to put the CD in every time. I tried from the regular FS2004 executable and it still had the same error though.
I downloaded the full F16 panel from Eric's site and tried that but still no good.
I also tried the F16.gau file you sent, still no luck.
I also tried putting the full path in the FSUIPC.KEY file, alas no joy.
Here's what I do;
I start FS2004 with the default flight
I then select the RCAF CF18 aircraft, my radar is OFF by default.
After the aircraft loads, I press a panel switch to activate the radar and that's when I get the error message. I've tried with the radar on by default, still no good. The F16 HUD in the F16.gau file works fine, it's just the radar that is giving the problem.
I transfered the aircraft from FS2002 where this panel works flawlessly via FSUIPC 2.975, it's a total mystery why it won't recognize the key and as you said, it doesn't even not the F16.gau file by name in the log. It just seems as though FSUI isn't meshing with FS2004 quite right on my system.
Any other idea's ?
Glen