AssetPostProcessor failing to run modelImporter.SearchAndRemapMaterials

Hi all!
I've really been getting into the AssetPostProcessor lately. It's great for speeding up pipelines, but I can't seem to get modelImporter.SearchAndRemapMaterials working
Does something look out of whack with this script? It just seems I still have to press the button manually to make it actually work.
Any ides what I might be doing wrong there?

Code (CSharp):

1.     void OnPostprocessModel(GameObject g)
2.     {
3.         ModelImporter modelImporter = assetImporter as ModelImporter;
4.         if (modelImporter.materialSearch == ModelImporterMaterialSearch.Everywhere)
5.         {
6.             Debug.Log("Full Projet search for existing materials for ->> " + g.name);
7.             modelImporter.SearchAndRemapMaterials(ModelImporterMaterialName.BasedOnTextureName, ModelImporterMaterialSearch.Everywhere);
8.         }
9.     }

Thanks!
Pete