Mods not loaded in headless mode on linux

comejv · 28 May 2025 14:23

Hello, when using the headless flag on linux my mod is not recognized anymore when loading it through BeamNGpy or -lua "extensions.load('xlab_xlabCore')".
I get this error: 1.94681|E|GELua.extensions| extension unavailable: "xlab_xlabCore" at location: "xlab/xlabCore"
But without the headless flag it works just well.
My mod is zipped in the user mod folder and provides lua/ge/extensions/xlab/xlabCore.lua.

While looking at the lua codebase I also found this comment:
-headless is working differently than expected and should not be used
Is the -noui flag different?

Any help appreciated.

asaeed · 30 May 2025 13:28

Hello @comejv,

Headless mode shouldn’t affect the extensions. However, for the time being, please place the /xlab directory inside the following path in your BeamNG.tech root folder

Let me know if you need further assistance!

comejv · 30 May 2025 17:25

Hello @asaeed,
Thank you for your answer! Copying lua/ge/extensions/xlab from my mod folder to the BeamNG root sources worked. What’s weird is that:

I didn’t need to copy the files in lua/vehicles…
I needed to use both -headless and -noui at the same time otherwise the extension cannot be found, even after copying to root folder.

But also the console has a lot of errors due to headless, mainly :

13.24670|E|queueJSUITexture| UI texture '@screen_gps' not found. Unable to execute JS code: map.setData({"terrainTiles":{},"time":"13:20","nodes":{}})
13.35641|E|queueJSUITexture| UI texture '@screen_gps' not found. Unable to execute JS code: map.updateData({"x":-6.5611102399998e-06,"speed":0.027057242766023,"y":-0.00014384717451321,"zoom":150.04058586415,"ignitionLevel":2,"rotation":180.00030133538})
 13.35643|E|queueJSUITexture|     (currently available UI textures: )

I tried putting if headless_mode then return end in a few places in vehicle/controller/beamNavigator.lua without success. Any idea how to suppress the error or fix it?

Thank you.

asaeed · 30 May 2025 18:34

Hello @comejv,
Thank you for your feedback — we’ll look into it. Could you please let us know your versions of BeamNG.tech, BeamNGpy, and your Linux distribution and version?

Thank you.

comejv · 30 May 2025 18:37

Sure thing!
0.35, 1.32, Ubuntu 24.04.2 LTS on kernel 6.8.0-60-generic.

If you need me to run tests on my end don’t hesitate to ask!

aivora · 4 June 2025 07:29

Hi, thank you for the report, I fixed the issue for 0.36

Headless mode is the only mode that works without spawning a window, not sure what the comments in lua codebase try to say.

comejv · 4 June 2025 10:29

Thanks a lot! Any quick patch I can apply?

aivora · 4 June 2025 12:21

Running with both -headless -noui should work as a quick fix, after the patch -noui can be removed (but should not cause extra issues).

comejv · 4 June 2025 14:44

What about the queueJSUITexture errors, any way to block them?

aivora · 5 June 2025 07:33

You should be able to patch lua/ge/extensions/ui/uiNavi.lua like this:

local function requestVehicleDashboardMap(dashboard, initmap, vehId)
  if not dashboard then return end
  if headless_mode then return end -- add this line
  local targetVeh = vehId and scenetree.findObjectById(vehId) or  getPlayerVehicle(0)
  if targetVeh then
  -- ... rest of function
end

Or disable/remove any navigation dashboards you are using (the UI app, but also navigation dashboards inside vehicles).

comejv · 5 June 2025 14:45

The patch didn’t work. I tried adding that line in uiNavi, beamNavigator, dynoClient and vehicles (basically at every mention of queueJSUITexture) and I still get this error approx 15 times per second:

13.82670|E|queueJSUITexture| UI texture '@screen_gps' not found. Unable to execute JS code: map.updateData({"x":0.0017002310266889,"speed":15.318448448181,"y":-1.7668433804065,"zoom":172.97767267227,"ignitionLevel":2,"rotation":180.11276650324})
 13.82672|E|queueJSUITexture|     (currently available UI textures: )

Is there a way to remove the dashboards using beamngpy? Or in Lua?

aivora · 6 June 2025 08:30

Can you please share the script that spams these errors? I cannot reproduce and would have to guess where the issues come from. There are a few more places which call queueJSUITexture under the hood, for example the obj:queueWebViewJS function, but I didn’t manage to set up an environment where I’d get the logspam.

comejv · 9 June 2025 18:26

Hello, here is the minimal steps needed to reproduce the issue on my end:

>>> from beamngpy import BeamNGpy, Scenario, Vehicle
>>> b = BeamNGpy(host="127.0.0.1", port=25252)
>>> scenario = Scenario("tech_ground", "On how to use custom mods")
>>> v=Vehicle("ego_vehicle", model="etk800", license="AI")
>>> scenario.add_vehicle(v, pos=(0, 0, 0), rot_quat=(0, 0, 1, 0))
>>> b.open()
<beamngpy.beamng.beamng.BeamNGpy object at 0x7fffe9388b60>
>>> scenario.make(b)
>>> b.scenario.load(scenario)

Exerpts from the lua console that seem relevant:

160.45826|I|spawn| Spawning object 'etk800' with default config
160.48770|D|GELua.core_vehicle_manager.vehicleLoader| partConfigData [string] = ""
160.48877|W|GELua.core_vehicle_partmgmt.| Problems reading requested configuration: ""
160.48885|W|GELua.core_vehicle_partmgmt.main| Supplied config file:  not found. Using default config instead.
160.52286|E|GELua.jbeam.loadJBeamFile| Duplicate part found: license_plate_qld_1 from file /vehicles/common/licenseplates/mount_coottha/license-plate-mountcoottha-2-1.jbeam
...
161.40896|I|BeamNGVehicle| Unable to create UI texture, as UI is disabled
161.41715|I|BeamNGVehicle| Unable to create UI texture, as UI is disabled
161.41726|E|queueJSUITexture| UI texture '@etk800_gauges_screen' not found. Unable to execute JS code: setup({"uiUnitPower":"hp","uiUnitTorque":"metric","uiUnitVolume":"l","uiUnitDate":"ger","uiUnitConsumptionRate":"metric","uiUnitLength":"metric","displayWidth":512,"materialName":"@etk800_gauges_screen","displayHeight":256,"uiUnitWeight":"kg","uiUnitEnergy":"metric","uiUnitPressure":"bar","uiUnitTemperature":"c","htmlPath":"local://local/vehicles/etk800/gauges_screen/gauges_screen.html","unit":"metric"})
161.41726|E|queueJSUITexture|     (currently available UI textures: )
161.42369|E|GELua.scenario_scenarios.scenarios| Prefab: on how to use custom mods already exist in level. Rejecting loading of duplicate.
...
161.93113|D|GELua.core_gamestate.gamestate| exiting : worldReadyState
161.93113|W|GELua.core_gamestate.gamestate| trying to exit state we haven't been in before -please check your code
161.93114|D|GELua.core_gamestate.gamestate| show main menu (false)
161.93115|D|GELua.core_gamestate.gamestate| exiting loading screen to menu
...
162.00093|E|queueJSUITexture| UI texture '@etk800_screen' not found. Unable to execute JS code: map.updateData({"x":9.291918541976e-05,"speed":0.33106674849987,"y":0.00031327302394857,"zoom":150.49660012275,"ignitionLevel":2,"rotation":359.99563368789})
162.00097|E|queueJSUITexture|     (currently available UI textures: )
162.02892|E|queueJSUITexture| UI texture '@etk800_screen' not found. Unable to execute JS code: map.updateData({"x":-4.9842790303956e-05,"speed":0.4200365871191,"y":0.00037013318146251,"zoom":150.63005488068,"ignitionLevel":2,"rotation":359.99943127307})
162.02894|E|queueJSUITexture|     (currently available UI textures: )
162.04114|D|libbeamng.XalVE| Loaded vehicle xlabCore
162.04121|I|libbeamng.TechCom| Started listening on 127.0.0.1/42749.
162.05289|I|GELua.tech_techCore.TechGE| New vehicle connection: 2665, 42749
162.06897|E|queueJSUITexture| UI texture '@etk800_screen' not found. Unable to execute JS code: map.updateData({"x":0.00015931217882326,"speed":0.48061328530312,"y":-0.00023253862434558,"zoom":150.72091992795,"ignitionLevel":2,"rotation":359.99977278252})
162.06899|E|queueJSUITexture|     (currently available UI textures: )
...
162.39889|I|libbeamng.TechVE| Accepted new vehicle client: 127.0.0.1/38918
162.44295|E|queueJSUITexture| UI texture '@etk800_screen' not found. Unable to execute JS code: map.updateData({"x":7.638679729105e-05,"speed":0.32665564119816,"y":-0.00028206199522174,"zoom":150.4899834618,"ignitionLevel":2,"rotation":359.99958153723})
162.44297|E|queueJSUITexture|     (currently available UI textures: )
etc.

And changing the vehicle model to utv gives the @screen_gps errors I reported earlier.

These results are with the suggested requestVehicleDashboardMap patch, without loading my extensions.

comejv · 9 June 2025 21:41

Quick update, after trying things from a clean install of BeamNG I realised that putting my mod’s files in the main lua folder is not what resolved the issue, I only needed -noui in addition to -headless.

The queueJSUITexture issue continues.

aivora · 13 June 2025 14:00

Hi again, thank you for the update, I tested with the 0.35.5.0 BeamNG.tech build with the -headless argument and the Python script you provided, and I’m not getting any errors relaed to queueJSUITexture. Did you also try without the mod? Only thing I can think of is that one of the files in the mod overrides a BeamNG Lua file, causing this error to happen.

comejv · 13 June 2025 15:06

Thank you for the update.
Have you tried with the -noui flag? The issue only appears when I use both -headless and -noui. I need the latter because without it my mod is not found by BNG when using -headless.

On my end the issue appears even on a freshly unzipped BNG and with the mod deleted from user folder.