Hello Peter,
This question is about the button mapping for PMDG777 in P3D v3.2.3, with FSUIPC4 v4.949h.
Back in the P3D v3.1 era (and any version earlier), I mapped a button on my saitek yoke to send ctrl+shift+z when the button is pressed through FSUIPC. This button press is meant to disconnect the autopilot in PMDG777 and it worked flawlessly in previous versions (of P3D and FSUIPC).
However since I updated my P3D to v3.2.3 this function seems not working. Strangely enough, all other button assignments that I have in the FSUIPC work as it should (trim up/dn, flaps up/dn...etc), but just this single button. I checked the "key command" setting in PMDG777 itself and the setting is in agreement bewteen FSUIPC and PMDG777 for disconnecting the autopilot; I checked and confirmed that this button does send out signal when being pressed (through the default device setting in Win7). I wonder if you have received similar user report since the release of P3D v3.2.3?
Win7 SP1
P3D v3.2.3
FSUIPC v4.949h
Latest version of PMDG777
Thanks.