Find missing plugin instances

( -- find all instances of 'standin' missing classes
 
	standin_classes = #(Missing_Point4_Control,
		Missing_SoundObj,
		Missing_Shader_Plug_in,
		Missing_Float_Control,
		Missing_Shadow_Type,
		Missing_WSM_Object,
		Missing_TextureMap,
		Missing_GeomObject,
		Missing_UVGen,
		Missing_XYZGen,
		Missing_Camera,
		Missing_Texture_Output_Plug_in,
		Missing_Point3_Control,
		Missing_Renderer,
		Missing_Atmospheric,
		Missing_Matrix3_Control,
		Missing_Light,
		Missing_Helper,
		Missing_System,
		Missing_Render_Element_Plug_in,
		Missing_OSM,
		Missing_Position_Control,
		Missing_Shape,
		Missing_Texture_Bake_Element,
		Missing_RefTarget,
		Missing_Custom_Attribute_Plugin,
		Missing_Mtl,
		Missing_Radiosity,
		Missing_Rotation_Control,
		Missing_Exposure_Control,
		Missing_Render_Effect,
		Standin_for_missing_MultiPass_Camera_Effect_Plugin,
		Missing_RefMaker,
		Missing_Scale_Control,
		Missing_Morph_Control,
		Missing_WSM
	)
 
	for c in standin_classes do
	(
		instances = getclassinstances c
		if instances.count != 0 do
		(
			format "class:%; instances:%\n" c instances
			for instance in instances do
			(
				deps = refs.dependents instance
				format "instance:%; dependents%\n" instance deps
			)
		)
	)
	ok
)