ProcessFailedException when using ModelicaSystem

[bc0n]

If I directly use loadFile(), loadModel(), buildModel(), and simulate() via sendExpression, I can simulate this model without problem, but using ModelicaSystem()/buildModel/simulate leads to a ProcessFailed exception:
caught error[ProcessFailedException(Base.Process[Process(`'C:/Users/BENCON~1/AppData/Local/Temp/jl_nFAMOr/FallingModel.exe'`, ProcessExited(3221225785))])]

where I've wrapped the simulate() in a try/catch:

modelText = """model FallingModel
  inner Modelica.Mechanics.MultiBody.World world;
  Modelica.Mechanics.MultiBody.Joints.FreeMotion freeMotion(animation = false,r_rel_a(start = {1, 0, 0}), w_rel_a_fixed = true, w_rel_a_start = {1, 2, 3});
  Modelica.Mechanics.MultiBody.Parts.Body body(animation = true,m = 1, r_0(start = {1, 0, 0}));
equation
  connect(world.frame_b, freeMotion.frame_a);
  connect(freeMotion.frame_b, body.frame_a);
  annotation( uses(Modelica(version = "4.0.0")));
end FallingModel;
"""
modelPath = "./FallingModel.mo"
modelName = "FallingModel"

write("FallingModel.mo", modelText)

omc = OMJulia.OMCSession()
try
  OMJulia.ModelicaSystem(omc, modelPath, modelName)
  OMJulia.buildModel(omc) 
  OMJulia.simulate(omc)
catch e
  println("\ncaught error[$e]\n")
  ges = OMJulia.sendExpression(omc, "getErrorString()") 
  println("getErrorString()=$ges")
  dump(omc)
finally
  OMJulia.sendExpression(omc, "quit()", parsed=false)
end

see attached console output.

I suspect the problem is in an argument added to omc by ModelicaSystem/later, but nothing is jumping out at me. I will note that the self-assembled omc is about half of the size as the one made by ModelicaSystem.

Thanks

[arun3688]

@bc0n there is no need to build the model again using buildModel() API as the constructor ModelicaSystem you should use buildModel to rebuild the model with new settings. So it should be

  omc = OMJulia.OMCSession()
  OMJulia.ModelicaSystem(omc, modelPath, modelName)
  OMJulia.simulate(omc)

[bc0n]

Ok @arun3688, though I receive the same error...
I'm on Win10 x64, [0f4fe800] OMJulia v0.2.1, julia v1.8.1

[bc0n]

And fyi I do not receive the error under wsl/ubuntu.

[arun3688]

@bc0n I tried to simulate the example provide by you and it is working for me, see the output below

julia> using OMJulia
julia> omc = OMJulia.OMCSession()
julia> ModelicaSystem(omc,"failing.mo", "FallingModel")
julia> simulate(omc)
LOG_SUCCESS       | info    | The initialization finished successfully without homotopy method.
LOG_SUCCESS       | info    | The simulation finished successfully.

and i am using Julia-1.9.2

[arun3688]

@bc0n I just looked into you error log C:/Users/BENCON~1/AppData/Local/Temp/jl_4Bl1JD/FallingModel.exe, It might be a problem with temp directory, Could you please make sure the temp directory has admin rights or start the julia repl as administrator and test it

[bc0n]

Thanks for the suggestion @arun3688, I'm not finding the cause. I see the error in v1.8.1 and it's gone in 1.9.2, so closing this.

For what it's worth, I added two simulate() tests in my fork since there weren't any. https://github.com/mechanomy/OMJulia.jl/actions/runs/5885873274/job/15962905920