diff --git a/modules/aeolus/datasource.py b/modules/aeolus/datasource.py
index e402d401289bb9e576ff7a9995ad7ea0f5e9ba76..edc6f88dabe9de7f29323c8328affe5034879621 100644
--- a/modules/aeolus/datasource.py
+++ b/modules/aeolus/datasource.py
@@ -12,7 +12,7 @@ class Files:
     def __init__(self, files_path, file_time_span, pattern):
         self.flist = glob.glob(files_path + pattern)
         if len(self.flist) == 0:
-            raise GenericException('no matching files found in: ' + files_path)
+            raise GenericException('no matching files found in: ' + files_path + pattern)
 
         self.ftimes = []
         self.span_seconds = datetime.timedelta(minutes=file_time_span).seconds