diff --git a/valid_variables_script2.R b/valid_variables_script2.R
index bb622837613d873f82bdf9db1282086c713d7010..ca775a57b3574d903f9e91c1242af67ad575c79c 100644
--- a/valid_variables_script2.R
+++ b/valid_variables_script2.R
@@ -267,6 +267,7 @@ valid_columns <- as.data.frame(check_valid_columns$colnames)
 res <- ""
 res <- check_values_format(valid_columns, codebook)
 cat(res)
+cat(check_valid_columns$not_colnames)
 
 datashield.logout(connections)