diff --git a/src/g5505_file_reader.py b/src/g5505_file_reader.py
index 2d06f0d..2b6c815 100644
--- a/src/g5505_file_reader.py
+++ b/src/g5505_file_reader.py
@@ -117,7 +117,7 @@ def read_txt_files_as_dict(filename : str ):
         except yaml.YAMLError as exc:
             print(exc)
     # Verify if file can be read by available intrument configurations.
-    if not any(key in filename for key in config_dict.keys()):
+    if not any(key in filename.replace(os.sep,'/') for key in config_dict.keys()):
         return {}