VERY IMPORTANT REMARK ON P3Dv4
I had the same problem.
Please checked ,if you have another "rcb-gauges /
VSTOLControlIPC_Function.xml
" in your default gauges folder.
Maybe this is the answer to such problems !!!!
NEVER, and I emphasize NEVER, should you have a file named
VSTOLControlIPC_Function.xml in your main /Gauges/rcb-gauges/ folder.
Not sure how such a file ends up there, because I can't remember ever making an addon that puts this file in the main
.../Gauges/rcb-gauges/ folder.
The problem stems from the new gauge-search order in P3Dv4, which is different then in previous P3D versions (and FSX).
In FSX / P3Dv2/3 the program searches first in the
local panel folder of an aircraft; however, P3Dv4 appears to search in the main (whatever your assigned as default) /Gauges folder first.
And since I use the filename
VSTOLControlIPC_Function.xml in ALL my VSTOL implementations (30+), it means that P3Dv4 may load the wrong .xml file.
No idea why LM has changed the search order in P3Dv4, but it can introduce many problems with loading gauges.
IMHO a bad decision (from a compatibility point-of-view) ....
The "strong" point of FSX / P3Dv2/3 was, that whatever gauge is in your local aircraft panel folder, always has preference over the one in the main/default Gauges folder.
Which makes version control of gauge file versions with the same name a non-issue; unlike in P3Dv4.
Rob
PS: the MV22B Rel2 doesn't require FSUIPC anymore ; but having it installed doesn't do any harm either ...