diff --git a/kibot/out_bom.py b/kibot/out_bom.py
index b97de596..2fe8ed49 100644
--- a/kibot/out_bom.py
+++ b/kibot/out_bom.py
@@ -572,7 +572,8 @@ class BoMOptions(BaseOptions):
                 if new_col_l not in valid_columns_l:
                     # The Field_Rename filter can change this situation:
                     # raise KiPlotConfigurationError('Invalid column name `{}`'.format(new_col))
-                    logger.warning(W_BADFIELD+'Invalid column name `{}`'.format(new_col))
+                    logger.warning(W_BADFIELD+'Invalid column name `{}`. Valid columns are {}.'.
+                                   format(new_col, list(valid_columns_l.values())))
                 columns.append(new_col)
                 column_levels.append(level)
                 column_comments.append(comment)
diff --git a/kibot/out_kibom.py b/kibot/out_kibom.py
index bede0b78..65f33f6c 100644
--- a/kibot/out_kibom.py
+++ b/kibot/out_kibom.py
@@ -267,7 +267,9 @@ class KiBoMConfig(Optionable):
                         self.join.append(col.field+'\t'+col.join)
                 # Check this is a valid column
                 if new_col.lower() not in valid_columns_l:
-                    raise KiPlotConfigurationError('Invalid column name `{}`'.format(new_col))
+                    # Should we relax it? (as in out_bom)
+                    raise KiPlotConfigurationError('Invalid column name `{}`. Valid columns are {}.'.
+                                                   format(new_col, list(valid_columns_l.values())))
                 columns.append(new_col)
                 columns_l[new_col.lower()] = new_col
             # Create a list of the columns we don't want