[ModelExecutionData] include the original exception if reraised as ModelExecutionException

Author: syntron

OMPython/OMCSession.py

@@ -535,9 +535,9 @@ def run(self) -> int:
             if stderr:
                 raise ModelExecutionException(f"Error running model executable {repr(cmdl)}: {stderr}")
         except subprocess.TimeoutExpired as ex:
-            raise ModelExecutionException(f"Timeout running model executable {repr(cmdl)}") from ex
+            raise ModelExecutionException(f"Timeout running model executable {repr(cmdl)}: {ex}") from ex
         except subprocess.CalledProcessError as ex:
-            raise ModelExecutionException(f"Error running model executable {repr(cmdl)}") from ex
+            raise ModelExecutionException(f"Error running model executable {repr(cmdl)}: {ex}") from ex
 
         return returncode