CBUSH Doesn't Constrain Model in Modal Analysis

User: "Altair Forum User"
Altair Employee
Updated by Altair Forum User

I have a model with an RBE3 constraint at the hole connected to a CBUSH element. I run a modal analysis, but I don't see the model constrained at all with the CBUSH element and I see rigid body modes still even though the CBUSH element should constrain it? . 

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