diff --git a/src/asammdf/gui/asammdfgui.py b/src/asammdf/gui/asammdfgui.py
index e1ef8a601..50a9aeb29 100644
--- a/src/asammdf/gui/asammdfgui.py
+++ b/src/asammdf/gui/asammdfgui.py
@@ -2,24 +2,6 @@
 import os
 import sys
 
-os.environ["QT_API"] = "pyside6"
-os.environ["PYQTGRAPH_QT_LIB"] = "PySide6"
-
-alternative_sitepacakges = os.environ.get("ASAMMDF_PYTHONPATH", "")
-
-if alternative_sitepacakges:
-    os.environ["PYTHONPATH"] = alternative_sitepacakges
-    sys.path.insert(0, alternative_sitepacakges)
-
-import pyqtgraph
-from PySide6 import QtWidgets
-
-from asammdf.gui.utils import excepthook, set_app_user_model_id
-from asammdf.gui.widgets.main import MainWindow
-from asammdf.gui.widgets.plot import monkey_patch_pyqtgraph
-
-sys.excepthook = excepthook
-
 
 def _cmd_line_parser():
     """"""
@@ -30,6 +12,24 @@ def _cmd_line_parser():
 
 
 def main(measurements=None):
+    os.environ["QT_API"] = "pyside6"
+    os.environ["PYQTGRAPH_QT_LIB"] = "PySide6"
+
+    alternative_sitepacakges = os.environ.get("ASAMMDF_PYTHONPATH", "")
+
+    if alternative_sitepacakges:
+        os.environ["PYTHONPATH"] = alternative_sitepacakges
+        sys.path.insert(0, alternative_sitepacakges)
+
+    import pyqtgraph
+    from PySide6 import QtWidgets
+
+    from asammdf.gui.utils import excepthook, set_app_user_model_id
+    from asammdf.gui.widgets.main import MainWindow
+    from asammdf.gui.widgets.plot import monkey_patch_pyqtgraph
+
+    sys.excepthook = excepthook
+
     monkey_patch_pyqtgraph()
     parser = _cmd_line_parser()
     args = parser.parse_args(sys.argv[1:])