I am displaying an OBJ file which has a single textured mesh, the texture is accessed by the OBJ as an mtl file which in turn references the texture image. I change the texture image and to get the obj to reflect that I create a new mtl file, saved using the SaveData node. All works.
Until I save the composition as an application. The mtl file gets created in the directory the application resides but the OBJ file references the mtl file in the resources of the application package.