diff --git a/calculate_NRpars.m b/calculate_NRpars.m
index 0d037ea..218343f 100644
--- a/calculate_NRpars.m
+++ b/calculate_NRpars.m
@@ -285,6 +285,7 @@
                 tmp = [tmp sprintf('- calculating ''%s'' features\n', feature_function('group'))];
                 tmp = [tmp sprintf('- mode ''pars'' returned %d values, but mode ''pixels'' returns %d parameter names\n', ...
                     length(values), length(feature_function('parameter_names')))];
+                tmp = [tmp sprintf('- Note: make sure your parameters are stored in a vector and not a cell array\n')];
         
                 % delete parameter file, which may also contain this error
                 delete(parfile);