Thanks for your assistance with this. It is possible I installed the trainers with admin rights. The post where you solved the problem was an interesting read! I ran X-plane as administrator and the GTN powered up in the 172. I quit and re-ran without admin rights and it worked too, just as your post stated.
I didn't think to check the sys_nandi permissions before running X-Plane as admin, but when I checked it after doing so, the username line was not there. Nonethe
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