OpenModelica compiled with UCRT can't build model

[AnHeuermann]

Description

I can't compile Modelica models with OMJulia.jl.

How to reproduce

Build OpenModelica with Universal C runtime (UCRT) following https://github.com/AnHeuermann/OpenModelica/blob/msys2-ucrt64/OMCompiler/README.Windows.md#13-install-msys2. (This might become the default to build OpenModelica soon.)

Then start Julia from e.g. PowerShell and run:

using OMJulia

pathToOmc = "path\\to\\OpenModelica\\build_cmake\\install_cmake\\bin\\omc.exe"
omc=OMJulia.OMCSession(pathToOmc)

msg = sendExpression(omc, "getVersion()")
@info msg
sendExpression(omc, "loadModel(Modelica)")
msg = sendExpression(omc, "buildModel(Modelica.Electrical.Analog.Examples.CauerLowPassAnalog)")
@info msg
msg = sendExpression(omc, "getErrorString()")
@info msg

[ Info: Setting environment variable OPENMODELICAHOME="D:\workspace\OM\OpenModelica\build_cmake\install_cmake" for this session.
[ Info: Path to zmq file="C:\Users\AHEUER~1\AppData\Local\Temp\openmodelica.port.julia.mm9RDN43qR"
[ Info: v1.22.0-dev-262-gdbaa7ffa95-cmake
[ Info: ["", ""]
┌ Info: Error: Error building simulator. Build log: Das System kann den angegebenen Pfad nicht finden.
│ Das System kann den angegebenen Pfad nicht finden.
└ RESULT: 3

Translation: The system can't find the specified path. Result 3.

Starting Julia from OMDev bash fixes the issue, because the msys tools are in PATH.

Version

• OS: Windows 11
• OMDev: UCRT64 environment instead of the default MINGW64 environment
• Julia Version 1.9.2
• OMJulia @67f69adb6dfc711402e08ed5feb87983796d4475

[AnHeuermann]

Issue was a missing environment variable (because I don't have an installed OpenModelica with UCRT64 yet). So one needs to set OMDEV_MSYS in addition to OMDEV.