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Bug XPlane 12 plugin not listening

Discussion in 'SimTools Pro & Entertainment Version' started by daef, Jul 15, 2025 at 20:23.

  1. daef

    daef New Member

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    My Motion Simulator:
    6DOF
    I cannot get the xplane 12 plugin to listen on UDP/4123.

    When I look at the output of `netstat -a -n` no process listens on 4123. When I listen on UDP/4123 using netcat I get telemetry data from xplane. Dragging the steam://-link from the desktop onto the plugin associates it (it is visible as steam game in the configuration export) but pressing the play button doesn't start the game either.

    What am I doing wrong?
    daef, Jul 15, 2025 at 20:23
    #1
  2. daef

    daef New Member

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    My Motion Simulator:
    6DOF
    When looking closer at 588_GamePlugin.dll it looks as if StartUDP_GameListener unconditionally tries to listen on 4123 (ignoring the configured port).

    The only thing that seems to be called earlier is _UDPRelay_Open. I cannot find where to configure the UDP relay functionality in the UI. Also I don't see how this would affect the succinct execution...

    The error log stays empty.
    daef, Jul 15, 2025 at 20:29
    #2
  3. daef

    daef New Member

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    My bad, the dialog I thought should configure the listening address is configuring the udp relay (at least it says so in the title, and it writes 588_PacketRelay.cfg

    Nevertheless - whatever I enter - no open ports :'(
    daef, Jul 15, 2025 at 20:45
    #3
  4. daef

    daef New Member

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    okay, the problem seems to be more fundamental. since simtools also didn't start live for speed i've uninstalled simtools, checked that \program files\simtools and appdata\simtools are gone, even renamed the license directory in appdata to be sure that nothing old remains. then after reinstalling simtools (now in demo mode) and adding the lfs plugin it still wont start lfs. GameStart seems never to be called on the plugin. how can i debug this?
    daef, Jul 15, 2025 at 23:50
    #4
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Can you please post pictures of all of your settings.

    Have you configured the required in-game settings:

    Settings.JPG
    noorbeast, Jul 16, 2025 at 00:34
    #5
  6. daef

    daef New Member

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    sure, here you go

    Attached Files:

    daef, Jul 16, 2025 at 10:03
    #6
  7. daef

    daef New Member

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    836 shows the interface configuration
    837 the simtools options page
    838 the xplane data output configuration
    839 that simtools doesnt detect that xplane is running
    840 that xplane is definately sending telemetry to 127.0.0.1 4123
    841 that nothing is listening on 4123 (neither simtools, nor is any other process blocking the port)
    daef, Jul 16, 2025 at 10:07
    #7
  8. daef

    daef New Member

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    looking for the 1000th time at the settings i now recognize that "auto detect launched games" was turned off.

    when i turn it on it detects that games are running again. when simtools detects that xplane is running it also starts to listen on 4123 and receives data again \o/

    how is this supposed to work without "auto detect" if at all?
    daef, Jul 16, 2025 at 10:14
    #8
  9. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Off the top of my head I am pretty sure you can manually start the plugin by hovering over it in the SimTools home screen, and double-clicking play.
    noorbeast, Jul 16, 2025 at 10:58
    #9