diff -r 9f75293fcd57 -r 84a66daa5e34 src/eric7/EricWidgets/EricSingleApplication.py --- a/src/eric7/EricWidgets/EricSingleApplication.py Sat Nov 02 17:25:32 2024 +0100 +++ b/src/eric7/EricWidgets/EricSingleApplication.py Sat Nov 02 19:28:14 2024 +0100 @@ -120,7 +120,7 @@ @type argparse.Namespace """ for filename in args.file_or_project: - ext = os.path.normcase(os.path.splitext(filename)[1]) + ext = os.path.splitext(filename)[1].lower() if ext in (".epj",): self.__openProject(filename)