Modal/transient analysis with unphysical rigid body modes

Warning: At least one body has been found to have only 1 element in at least 2 directions along with reduced integration.

Warning: At least one body has been found to have only 1 element in at least 2 directions along with reduced integration.  This situation can lead to invalid results or solver pivot errors.  Consider changing to full integration element control or meshing with more elements.  Offending bodies can be identified by Right-clicking in the Geometry window and choose Go To -> Bodies With One Element Through the Thickness.  Refer to Troubleshooting in the Help System for more details.

Switch to full integration for coarse brick elements

Geometry> Element Control > Manual

Select the part > Brick Integration Scheme > Full

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