[Closed] Removing XRef Materials from scene

heyhey,

i am prototyping a little tool for XRefing .max files.
i wrote a little function that localizes the Texturemaps fileNames (as i keep them local to the .max file location) after the XRef

here the material localisation function:

	fn localizeXRef_Mat XRef_Obj = 
	(
		for XR in XRef_Obj do  --looop through all XRef Objs 
		(
			local mat = XR.material.GetSrcItem resolveNested:true
			
			if hasProperty mat "materialList" then --mat is MultiMat
			(
				for m in mat.materialList do --loop through all subMaterials
				(

					for map in m.maps where map != undefined AND classOf map == Bitmaptexture do --loop through all textureMaps of current material
					(
						local n = map.fileName
						if not doesFileExist n do 
						(
							local p = getFilenamePath  XR.material.srcFileName --get XRef path

							map.fileName = p + n --mix with fileName and assign to TextureMap
						)
					)-- end Maps loop
	
				)--end subMTL loop
			)
			else --Single Mat
			(
					for map in mat.maps where map != undefined AND classOf map == Bitmaptexture do --loop through all textureMaps of current material
					(
						local n = map.fileName
						if not doesFileExist n do 
						(
							local p = getFilenamePath  XR.material.srcFileName --get XRef path

							map.fileName = p + n --mix with fileName and assign to TextureMap
						)
					)-- end Maps loop
			)
			for m in scenematerials where m == XR.material do
			(
				
				-- ??? remove the XRef Material ???
				
			)		
			XR.material = mat --assign localized material to current obj
		) -- end XRef OBJs loop
	)

my problem is: how can i get rid of the initial XRef material from my sceneMaterials, cuz it allways drops me an error about the missing textureFiles (wich r not missing in the localized material)
ive looked for some hours now but i cant seem to find a way to remove/reset/whatever the initial materials 0.O

thx in advance
-Insanto