Index: trunk/SDToolBox/outputmessages.py
===================================================================
diff -u -r42 -r45
--- trunk/SDToolBox/outputmessages.py	(.../outputmessages.py)	(revision 42)
+++ trunk/SDToolBox/outputmessages.py	(.../outputmessages.py)	(revision 45)
@@ -10,8 +10,10 @@
 error_no_valid_input_data = 'No InputData object was provided.'
 error_not_enough_coordinates = '' + \
     'Not enough coordinates were provided as InputData.coord_list.'
+error_no_valid_list_of_years = '' + \
+    'A list of years (int) to extract should be provided.'
 error_no_valid_list_of_vars = '' + \
-    'A list of variables (key) to extract should be provided.'
+    'A list of variables (str) to extract should be provided.'
 error_not_initialized_data_dict = '' + \
     'Data dictionary has not been initialized, ' + \
     'no xarray or netCDF can be created.'