diff --git a/OMPython/ModelicaSystem.py b/OMPython/ModelicaSystem.py
index 03c24b51..d4747f8e 100644
--- a/OMPython/ModelicaSystem.py
+++ b/OMPython/ModelicaSystem.py
@@ -464,6 +464,15 @@ def get_session(self) -> OMCSession:
         """
         return self._session
 
+    def get_model_name(self) -> str:
+        """
+        Return the defined model name.
+        """
+        if not isinstance(self._model_name, str):
+            raise ModelicaSystemError("No model name defined!")
+
+        return self._model_name
+
     def set_command_line_options(self, command_line_option: str):
         """
         Set the provided command line option via OMC setCommandLineOptions().
@@ -1931,9 +1940,13 @@ def run_doe():
         resdir = mypath / 'DoE'
         resdir.mkdir(exist_ok=True)
 
-        doe_mod = OMPython.ModelicaSystemDoE(
+        mod = OMPython.ModelicaSystem()
+        mod.model(
             model_name="M",
             model_file=model.as_posix(),
+        )
+        doe_mod = OMPython.ModelicaSystemDoE(
+            mod=mod,
             parameters=param,
             resultpath=resdir,
             simargs={"override": {'stopTime': 1.0}},
@@ -1960,15 +1973,8 @@ def run_doe():
 
     def __init__(
             self,
-            # data to be used for ModelicaSystem
-            model_file: Optional[str | os.PathLike] = None,
-            model_name: Optional[str] = None,
-            libraries: Optional[list[str | tuple[str, str]]] = None,
-            command_line_options: Optional[list[str]] = None,
-            variable_filter: Optional[str] = None,
-            work_directory: Optional[str | os.PathLike] = None,
-            omhome: Optional[str] = None,
-            session: Optional[OMCSession] = None,
+            # ModelicaSystem definition to use
+            mod: ModelicaSystem,
             # simulation specific input
             # TODO: add more settings (simulation options, input options, ...)
             simargs: Optional[dict[str, Optional[str | dict[str, str] | numbers.Number]]] = None,
@@ -1981,30 +1987,18 @@ def __init__(
         ModelicaSystem.simulate(). Additionally, the path to store the result files is needed (= resultpath) as well as
         a list of parameters to vary for the Doe (= parameters). All possible combinations are considered.
         """
-        if model_name is None:
-            raise ModelicaSystemError("No model name provided!")
-
-        self._mod = ModelicaSystem(
-            command_line_options=command_line_options,
-            work_directory=work_directory,
-            omhome=omhome,
-            session=session,
-        )
-        self._mod.model(
-            model_file=model_file,
-            model_name=model_name,
-            libraries=libraries,
-            variable_filter=variable_filter,
-        )
+        if not isinstance(mod, ModelicaSystem):
+            raise ModelicaSystemError("Missing definition of ModelicaSystem!")
 
-        self._model_name = model_name
+        self._mod = mod
+        self._model_name = mod.get_model_name()
 
         self._simargs = simargs
 
         if resultpath is None:
             self._resultpath = self.get_session().omcpath_tempdir()
         else:
-            self._resultpath = self.get_session().omcpath(resultpath)
+            self._resultpath = self.get_session().omcpath(resultpath).resolve()
         if not self._resultpath.is_dir():
             raise ModelicaSystemError("Argument resultpath must be set to a valid path within the environment used "
                                       f"for the OpenModelica session: {resultpath}!")
diff --git a/tests/test_ModelicaSystemDoE.py b/tests/test_ModelicaSystemDoE.py
index 0e8d6caa..6b2b0993 100644
--- a/tests/test_ModelicaSystemDoE.py
+++ b/tests/test_ModelicaSystemDoE.py
@@ -55,12 +55,17 @@ def test_ModelicaSystemDoE_local(tmp_path, model_doe, param_doe):
     tmpdir = tmp_path / 'DoE'
     tmpdir.mkdir(exist_ok=True)
 
-    doe_mod = OMPython.ModelicaSystemDoE(
+    mod = OMPython.ModelicaSystem()
+    mod.model(
         model_file=model_doe,
         model_name="M",
+    )
+
+    doe_mod = OMPython.ModelicaSystemDoE(
+        mod=mod,
         parameters=param_doe,
         resultpath=tmpdir,
-        simargs={"override": {'stopTime': 1.0}},
+        simargs={"override": {'stopTime': '1.0'}},
     )
 
     _run_ModelicaSystemDoe(doe_mod=doe_mod)
@@ -72,12 +77,18 @@ def test_ModelicaSystemDoE_docker(tmp_path, model_doe, param_doe):
     omcs = OMPython.OMCSessionDocker(docker="openmodelica/openmodelica:v1.25.0-minimal")
     assert omcs.sendExpression("getVersion()") == "OpenModelica 1.25.0"
 
-    doe_mod = OMPython.ModelicaSystemDoE(
+    mod = OMPython.ModelicaSystem(
+        session=omcs,
+    )
+    mod.model(
         model_file=model_doe,
         model_name="M",
+    )
+
+    doe_mod = OMPython.ModelicaSystemDoE(
+        mod=mod,
         parameters=param_doe,
-        session=omcs,
-        simargs={"override": {'stopTime': 1.0}},
+        simargs={"override": {'stopTime': '1.0'}},
     )
 
     _run_ModelicaSystemDoe(doe_mod=doe_mod)
@@ -86,15 +97,21 @@ def test_ModelicaSystemDoE_docker(tmp_path, model_doe, param_doe):
 @pytest.mark.skip(reason="Not able to run WSL on github")
 @skip_python_older_312
 def test_ModelicaSystemDoE_WSL(tmp_path, model_doe, param_doe):
-    tmpdir = tmp_path / 'DoE'
-    tmpdir.mkdir(exist_ok=True)
+    omcs = OMPython.OMCSessionWSL()
+    assert omcs.sendExpression("getVersion()") == "OpenModelica 1.25.0"
 
-    doe_mod = OMPython.ModelicaSystemDoE(
+    mod = OMPython.ModelicaSystem(
+        session=omcs,
+    )
+    mod.model(
         model_file=model_doe,
         model_name="M",
+    )
+
+    doe_mod = OMPython.ModelicaSystemDoE(
+        mod=mod,
         parameters=param_doe,
-        resultpath=tmpdir,
-        simargs={"override": {'stopTime': 1.0}},
+        simargs={"override": {'stopTime': '1.0'}},
     )
 
     _run_ModelicaSystemDoe(doe_mod=doe_mod)