I am getting the following error when running OMNotebook:

record SimulationResult
    resultFile = "Simulation failed.
Error: Error building simulator. Buildlog: command g++ not found. Check $OPENMODELICAHOME
Error: Error building simulator. Buildlog: command "C:\Program Files\OpenModelica1.5.0\/bin/Compile" not found. Check $OPENMODELICAHOME
"
end SimulationResult;

I have OPENMODELICAHOME defined correctly in the environment variables, = "C:\Program Files\OpenModelica1.5.0\"