STL File Problem: Solving in MSC Marc

[graba]

Hello guys,
I need help from you one more time. I have imported a STL file to marc and right now I have a problem. I would like to set this STL file as a rigid body but MSC Marc won't accept it as a surface (but it is a surface file). Do you have any clue how to solve it? Maybe this surface should be changed to NURBS?

 

[huntoon]

i don't know about marc, but i often work with STL files. one thing to be sure about is that all the normals are facing the way you intend. then check the faces and vertices to check that it looks alright. you may need to manually edit these points/lines.