Hi! I bought the book Maya Character Animation by Jae-jin Choi and have a small problem: I try to follow the tutorial, but Step 2 of the Subdivision Surface Character Modelling(Page 137 in the book) doesn't work. I get the following error message, when I try to convert Poly-->Sub-D: // Error: polyToSubdiv1 (Poly To Subdiv Node): One or more vertices is nonmanifold. // Nonmanifold geometry cannot be converted to a subdivision surface. // To clean up nonmanifold vertices, use Polygons->Cleanup with the nonmanifold option. // When I clean it up, the result that I get after the converting doesn't look as it should. What can I have done wrong ??? I hope that someone can help me.