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So i made a AT-DP driver helmet it looks great
- I wanted to test it in SWBFviewer and it says out if bounds and then it crashed
- is there any way to save the mask without having to start over, also what does that mean so i can prevent it next time thanks.

Use the "Check Sel" error checking tool in the export dialog of ZETools to see if anything is wrong with the mesh.
If you have N-gons in the topology ZETools will export a corrupt msh file.

it says bad faces? and gives me a list

That (probably) means you have n-gons, i.e. polygons with n sides, and specifically in this case, you have polygons that have 5 or more sides. See more here: http://blog.digitaltutors.com/ngons-triangles-bad/

The easiest way to fix this is to select your object and go to Modify, Poly Mesh, Triangulate. Or, if you don't want to triangulate the whole object, you can use the method described in this video to select all n-gons in the object, and then triangulate (following the same steps as before).

This error can also occur if your model has too many polygons per mesh. For example the XSI head will cause this crash if you don't reduce down the polygons. I have had this issue too when attempting to make realistic looking humans for myself.

thanks the problem was n-gons thanks