hello friends and thanky ou for helping me.

@kurt:
thx for the file - you´ve triangulated the mesh. well, the problems still exists, and I don´t want to triangulate my mesh.


@brian:
okay, what I did:

1. Modify-->Convert-->Polygons to Subdiv
I use 40000/64, and I don´t use "Keep Original" -because, if I don´t use "keep original" it is much more smooth.

2. I´be got an error message:
Error: polyToSubdiv1 (Poly To Subdiv Node): One or more edges is nonmanifold.
// Nonmanifold geometry cannot be converted to a subdivision surface.
// To clean up nonmanifold edges, use Polygons->Cleanup with the nonmanifold option. //

3. Polygons-->Cleanup
I´ve activated Nonmanifold geometry+Normals and Geometry


4. Modify-->Convert Polys to Subdiv
it worked, but it seems to be, that the mesh is now destroyed:



I don´t know where the problem is !!???

Maybe there is a problem with my normals - but I don´t know exactly what it can be.
The option "soften harden" with the normals works - okay, this is one point I understand, but I have the problem before with the damaged mesh.

@T-Rex:
Yes, that´s right Brian. My big problem is, that I modelled all my stuff before with cinema - but now I want to learn Maya - and I can see really more opportunities with maya. it´s really cool, but it takes a lot of time to learn - you know....


okay, so thanks for helping me,
bye for now and take care,
bernhard