Hi.

Maya 8.5, 2GB RAM, Precision 690, OS: Windows XP Pro

OK. I have a complicated poly which I have made. At some point it developed this non-manifold geometry. When I convert to subdiv and nothing happens and the script editor tells me about the problem I perform the Mesh> Clean-up with non-manifold geometry selected. OK, suddenly I have 79 extra un-merged vertices, many un-merged verts occupying the same space. I am now stuck in a loop. If I merge these verts, I get back to the non-manifold geometry problem and the process repeats.

I have checked that the normals all conform and are in the correct direction.

In the past when this has happened sometimes there are duplicate faces occupying the same space and by deleting them the problem is corrected. Not the case this time.

As I save successive instances of the scene I may be able to replace the corrupted sections of the poly with grafts from an earlier, uncorrupted version. However, I would like to know if there's a way to fix this problem and what the problem actually is.

Anyone know what to do?

Thanks.

Tristan