Hi everybody,

I'm using UEL in ABAQUS. I'm trying to define an element-based surface (elements are defined using UEL) but Abaqus gives me error:

ELEMENTS OF TYPE U201 CANNOT BE USED AS UNDERLYING ELEMENTS TO DEFINE AN ELEMENT-BASED SURFACE.

I'm aware of node-based surfaces but, I need the surface to be element-based.

I would appreciate if you could help me.

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