hello. i'm getting the attached error in 3ds max 2017 upon loading a custom library object(s) that i created. i created the library object in max 2017 if that makes a difference. despite getting the error, all seems to be OK, meaning i can render, adjust material, all properties within forestpro etc...
edit: ok, so what happens is, i select forestpro, then click a surface (a plane which is usually an editable poly), then click on library. i go to user library, select what i created (it's grass, like a lawn with 1 multi/sub material and 1 regular material) when i double click to select the library object, or if i highlight it and click ok, the library window closes and i'm returned to 3ds max and the error pops-up.