Using Version: B2 daily Aug 15 2018 (core 3 (DailyBuild Aug 15 2018)) C4d R18.057 Windows 10 64gb ram
Proxies created in 3ds max will import but have no textures (other people have mentioned this but it was supposed to be fixed in an earlier build?). Tried putting the textures in various locations to see if it would find them, no joy.
Proxies created in c4d using the "pick from scene" button fail with a "Loading failed due to memory error" message. This is just starting from a blank scene, creating any 3d object, converting to editable mesh first, and using pick from scene. It creates a cgeo file but that file cannot be loaded. Out of curiosity I tried loading that proxy back into max and it doesn't work in there either.