--- a/src/eric7/UI/UserInterface.py Sat Nov 02 17:25:32 2024 +0100 +++ b/src/eric7/UI/UserInterface.py Sat Nov 02 19:28:14 2024 +0100 @@ -1677,7 +1677,7 @@ opens = 0 for filename in args.file_or_project: try: - ext = os.path.normcase(os.path.splitext(filename)[1]) + ext = os.path.splitext(filename)[1].lower() except IndexError: ext = ""