when I am trying to collapse SHOP,GRID and Material SOP, it create subnet with red color which means there is something wrong.
error :the sub-network output operator failed to cook : /obj/floor/subnet1/switch_color_Attr
error : Invalid source subnet1 : point_visulization_color_red

when I created the SHOP in obj level …. it worked fine, but of course I need it to be in the SOP level.

I am using Houdini 9.5.170

cheers