What could cause the message that a contact pair has no elements? The contact was generated automatically in Simulation 11.0.

The following are two common reasons for this:

(1) mesh-based defeaturing of very small geometry and

(2) auto-rejection of contact with too-large of a gap.

Based on (1), it may be the case that one of your contact faces was being defeatured. If the part is very long and slender (like a beam), the mesher may defeature the end face. It may be better to sweep mesh this part. It is also possible to suppress defeaturing on a face by apply mapped meshing controls on it.

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