Hi, thanks for the quick response!
Unfortunately the max file is too large to send but here is a screenshot showing the scene and material editor.
In this case the leaf sub-materials 2 and 3 are not loading or rendering, but other textures are fine.
(The forest itself is hidden atm - the tree in the viewport isnt part of the scatter).
Everything seems to render fine except for several textures in the forest pack object which means atm I have mostly invisible forests
I am using Max Design 2013 (64bit) and V-Ray 2.40.03