FSUIPC 7.4.18 unresponsive mid-flight

[aurel42]

Hey John, I've seen this issue multiple times, it usually happens like this:

I start MSFS and FSUIPC via MSFSAddonsLinker. I set up and start a flight in the LJ35. If I'm lucky, I can complete the flight. If unlucky, FSUIPC will become unresponsive at some point (ie. all FSUIPC-powered controls stop working, clicking or double-clicking the tray icon does not open a menu or the FSUIPC window). This seems to happen always right around the time when I try to change the selected altitude of the AP. In the LJ35, I'm using four LUA scripts to change the altitude, this is the "lj35_alt+1000.lua":

--Increment Alerter by 1000
  alerter_value= ipc.readLvar("L:ALERTER_DIGITAL")    -- get current value in altitude window
  alerter_value_new = alerter_value + 1000             -- add 1000ft to altitude from window 
  if alerter_value_new > 60000 then
   alerter_value_new = 60000
  end
  ipc.writeLvar("L:ALERTER_DIGITAL", alerter_value_new)  -- update window altitude
  altsel_mode = ipc.readLvar("L:MODE_ALTSEL")
  alerter_digital=ipc.readLvar("L:ALERTER_DIGITAL")                      -- get value in altitude window
  if altsel_mode == 1 then                                               -- check if necessary mode is on 
   ipc.control(66124, alerter_digital)                                 -- update sim, window altitude into AP_ALT_VAR_SET_ENGLISH
  end
  

I fly on FSEconomy using the FSE FSUIPC client. When FSUIPC becomes unresponsive, the FSE FSUIPC client aborts the flight, displays an error dialog telling me that the connection to FSUIPC has been lost, and then becomes unresponsive as well (ie. can't close the error dialog, can't interact with the main FSE FSUIPC client window).

I suspect it has to do with the LUA scripts, but I can't be sure. According to my logs, I've done dozens of successful flights in the LJ35 from January to May 2024, I haven't flown the Lear since. I never experienced any issues like this back then, only now when I started flying the Lear again recently.

Log attached (as usual I removed my license information). I'm not sure I'm willing to put much effort into testing and debugging this on my side, considering the imminent release of MSFS2024. IF the launch is smooth and the new version is reasonably stable and free of showstopping bugs, I'll probably spend my spare time exploring the campaign.

Nevertheless, if I can provide any additional information regarding this issue, please let me know.

 

FSUIPC7.log