Need help with TMD (Recirculation Fans, B777)

Kipav · August 24, 2026 at 6:04 PM

I would like to request help as this code for system.tmd is getting me a STOP block trying to get Recirculation fans working. For reference, here is the code related to the system I am trying to implement

Code

// DynamicObjects
<[logic_greater][RecirculationFans1On][]
                <[string8][Input0][LeftUtilityBusAvailable.Output]>
                <[string8][Input1][0.5]>
>
<[logic_and][RecirculationFans1SpeedEnabled][]
          <[string8][Inputs][ AirConditioningUpperRecirculationFansButton.Output RecirculationFans1On.Output ]>
>
                                                                                                            
                                                                                                                       <[output][SystemsEnabled][]                                                                                                                                   <[string8][Input][RecirculationFans1SpeedEnabled.Output]>                                                                                                                                                 >

//     SoundObjects
                                                                                                                  
<[soundmapping][SystemsVolume][]
     <[string8][Input][SystemsEnabled.Output]>
     <[tmvector2d][Map][ (0.0 0.0) (1.0 1.0)]>
  >

Display More

ApfelFlieger · August 24, 2026 at 6:10 PM

From my own experience, I recommend reading the tm.log in the user directory with the filter "ERROR", because usually there is a hint what does not fit.

It could be that it has to be called output_free instead of output.

EDIT:

Another spontaneous idea is to change Engine4LoopExtern to Engine4LoopExternOutput.

Kipav · August 24, 2026 at 6:21 PM

Quote from ApfelFlieger

From my own experience, I recommend reading the tm.log in the user directory with the filter "ERROR", because usually there is a hint what does not fit.
It could be that it has to be called output_free instead of output.
EDIT:
Another spontaneous idea is to change Engine4LoopExtern to Engine4LoopExternOutput.

I cannot open tm.log because I am using mobile for this.

Jet-Pack (IPACS) · August 25, 2026 at 9:17 AM Official Post

You're missing a soundinput object for SystemsEnabled. Otherwise SystemsEnabled.Output is not known to the sound section and the error shows box up. We recommend using a desktop computer to modify aircraft. Modifying files on mobile is not recommended and can cause all kinds of issues.