1 files changed, 19 insertions, 1 deletions
diff --git a/source/blender/editors/space_node/node_add.c b/source/blender/editors/space_node/node_add.c
index 82a315366dc..a28d467df2e 100644
--- a/source/blender/editors/space_node/node_add.c
+++ b/source/blender/editors/space_node/node_add.c
@@ -339,7 +339,25 @@ static bNodeTree *node_add_group_get_and_poll_group_node_tree(Main *bmain,
   if (!node_group) {
     return NULL;
   }
-  if ((node_group->type != ntree->type) || !nodeGroupPoll(ntree, node_group)) {
+
+  const char *disabled_hint = NULL;
+  if ((node_group->type != ntree->type) || !nodeGroupPoll(ntree, node_group, &disabled_hint)) {
+    if (disabled_hint) {
+      BKE_reportf(op->reports,
+                  RPT_ERROR,
+                  "Can not add node group '%s' to '%s':\n  %s",
+                  node_group->id.name + 2,
+                  ntree->id.name + 2,
+                  disabled_hint);
+    }
+    else {
+      BKE_reportf(op->reports,
+                  RPT_ERROR,
+                  "Can not add node group '%s' to '%s'",
+                  node_group->id.name + 2,
+                  ntree->id.name + 2);
+    }
+
     return NULL;
   }