Hey @BrunoMartelli you may be dealing with an issue of a broken tool connection (that will make the select-auto-open stop working). And a broken tool connection is when one or both inputs to SurfaceScatter have been deleted from the tool. And the most common reason is that users delete the actual original mesh or the surface. In these cases, you can see if the tool is still in the list of active tools and then re-assign the scatter object/surface to get it fully working again.