Missing OM output if simulation fails

[syntron]

Just as a note - this is reported in the OpenModelica project: https://github.com/OpenModelica/OpenModelica/issues/13829

If I run a simulation which fails, OMPython can not catch the error messages. These are shown if the executeable is run on the console but the messages are not available in stdout or stderr if using OMPython. This makes it hard to debug errors on a big DoE - these messages whould help to find out why a simulation did fail.

Not copying data here - details and exampple in the link above.