diff --git a/epowcore/power_factory/utils.py b/epowcore/power_factory/utils.py
index 22d38d7..5ff2b35 100644
--- a/epowcore/power_factory/utils.py
+++ b/epowcore/power_factory/utils.py
@@ -51,9 +51,13 @@ def get_ctrl_param(ctrl_obj: Any, param: str | list[str]) -> Any:
     :rtype: Any
     """
     model_params = ctrl_obj.GetAttribute("parameterNames")
-    if not isinstance(model_params, list):
-        raise TypeError("Expected params to be a list: ['A,B,C']")
-    model_params = model_params[0].split(",")
+
+    if isinstance(model_params, str):
+        model_params = model_params.split(",")
+    elif isinstance(model_params, list):
+        model_params = model_params[0].split(",")
+    else:
+        raise TypeError("Expected parameterNames to be a string or list")
 
     if isinstance(param, str):
         if param not in model_params:
diff --git a/tests/local/powerfactory_test.py b/tests/local/powerfactory_test.py
index d31a2f7..d3cd29b 100644
--- a/tests/local/powerfactory_test.py
+++ b/tests/local/powerfactory_test.py
@@ -2,8 +2,8 @@
 import sys
 
 
-PF_ROOT = r"C:\Program Files\DIgSILENT\PowerFactory 2023 SP2"
-PF_PY = r"C:\Program Files\DIgSILENT\PowerFactory 2023 SP2\Python\3.10"
+PF_ROOT = r"C:\Program Files\DIgSILENT\PowerFactory 2025 SP4"
+PF_PY = r"C:\Program Files\DIgSILENT\PowerFactory 2025 SP4\Python\3.11"
 
 
 sys.path.append(PF_PY)
diff --git a/tests/power_factory/pf_converter_test.py b/tests/power_factory/pf_converter_test.py
index 04992cb..0dc457e 100644
--- a/tests/power_factory/pf_converter_test.py
+++ b/tests/power_factory/pf_converter_test.py
@@ -17,8 +17,8 @@ def test_minimal_conversion_no_errors(self) -> None:
         converter = PowerFactoryConverter()
         core_model = converter.to_gdf(PFModel("Minimal", "Base", 50.0))
 
-        self.assertEqual(len(core_model.graph.nodes), 8)
-        self.assertEqual(len(core_model.graph.edges), 7)
+        self.assertEqual(len(core_model.graph.nodes), 10)
+        self.assertEqual(len(core_model.graph.edges), 9)
 
         two_winding_id = core_model.type_list(TwoWindingTransformer)[0].uid