Hi there, Made a flight with the fantastic MU2 today, after a few minutes MAXX FX disabled itself, some systems of the MU2 stopped working. My log.txt provided this little info "License challenge failed; MaxxFX disabled" A Gizmo restart did the trick, but that brought my MU2 into Cold&Dark at FL280... was a challage to restart it in air... The only thing I did before that happened, was to reload a FlyWithLua Script, but that one related to a custom command for the altitude selector. No nothing bout Gizmo or the MU2. Ok.. best answer may be: Do not play with FlyWithLua midair, because it might brake something... Checked. But maybe the devs could spot something out of this. X-Plane 10.35 Win7 64bit