displacment map error

[Piotr]

I am trying to generate a map from a mesh I've imported into mudbox and sculpted, but when I try and export an .exr displacement map, mudbox gets stuck on 99% 'preparing meshes'....does this ring a bell with anyone? Does anyone have an idea what the problem might be? thanks

[Wayne]

could be non manifold geometry...bad uv's or a few other things....

Wayne...

[Piotr]

No i checked my mesh UV's are ok, and its cleaned up in Maya so has no mainfold geo.
What else can casue this problem ?

Thanks

Piotr