What does this error message states- Contact pair is not defined for bolt connectors. Do you wish to continue?
The error is indicating that a Bolt Connector definition has been made in your simulation but that a No Penetration contact set has not been defined between the objects that are being bolted together. You would want to define a No Penetration contact between these bodies to remove this warning (GoEngineer - Simulation: No Penetration Contacts).
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