diff --git a/distribution/lib/Standard/Table/0.2.32-SNAPSHOT/src/Error.enso b/distribution/lib/Standard/Table/0.2.32-SNAPSHOT/src/Error.enso
index f8b981d1c8f50..64266a0b12b0f 100644
--- a/distribution/lib/Standard/Table/0.2.32-SNAPSHOT/src/Error.enso
+++ b/distribution/lib/Standard/Table/0.2.32-SNAPSHOT/src/Error.enso
@@ -8,7 +8,7 @@ Missing_Input_Columns.to_display_text =
 
 ## One or more column indexes were invalid on the input table.
    Can occur when using By_Index.
-type Column_Indexes_Out_Of_Range (indexes : [Number])
+type Column_Indexes_Out_Of_Range (indexes : [Integer])
 
 Column_Indexes_Out_Of_Range.to_display_text : Text
 Column_Indexes_Out_Of_Range.to_display_text = case this.indexes.length of
diff --git a/distribution/lib/Standard/Table/0.2.32-SNAPSHOT/src/Internal/Table_Helpers.enso b/distribution/lib/Standard/Table/0.2.32-SNAPSHOT/src/Internal/Table_Helpers.enso
index a950a30f66735..87e223536b27a 100644
--- a/distribution/lib/Standard/Table/0.2.32-SNAPSHOT/src/Internal/Table_Helpers.enso
+++ b/distribution/lib/Standard/Table/0.2.32-SNAPSHOT/src/Internal/Table_Helpers.enso
@@ -47,20 +47,24 @@ select_columns internal_columns selector reorder on_problems warnings =
             result = Matching.match_criteria internal_columns names reorder=reorder name_mapper=(_.name) matching_strategy=matching_strategy on_problems=on_problems warnings=warnings
             Warnings.map_warnings_and_errors promote_no_matches_to_missing_columns result
         By_Index indices ->
-            # TODO partition indices into valid and invalid ones, so that we can report a warning or error
+            partitioned_indices = indices.partition (is_index_valid internal_columns)
+            good_indices = partitioned_indices.first
+            bad_indices = partitioned_indices.second
+            issues = if bad_indices.is_empty then [] else
+                [Column_Indexes_Out_Of_Range bad_indices]
             result = case reorder of
                 True ->
                     here.select_indices_reordering internal_columns indices
                 False ->
                     here.select_indices_preserving_order internal_columns indices
-            # TODO warn if there are any non-unique columns in result?
-            result.distinct on=_.name
+            # TODO warn if there are any non-unique columns in result? TODO test cases to illustrate
+            Problem_Behavior_Module.attach_issues_as_needed (result.distinct on=_.name) on_problems issues warnings=warnings
         By_Column columns ->
             names = columns.map .name
             result = Matching.match_criteria internal_columns names reorder=reorder name_mapper=(_.name) matching_strategy=(Matching.Exact case_sensitivity=True) on_problems=on_problems warnings=warnings
             Warnings.map_warnings_and_errors promote_no_matches_to_missing_columns result
 
-    issues = if result.is_empty then [] else [No_Output_Columns]
+    issues = if result.is_empty then [No_Output_Columns] else []
     Problem_Behavior_Module.attach_issues_as_needed result on_problems issues warnings=warnings
 
 ## PRIVATE