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BC in fluid cavity ball

BC in fluid cavity ball

BC in fluid cavity ball

(OP)
Dear users,

I would like to compress with a high pressure load a shell deformable ball filled with air . Even I replace the BC there is the same error message and I´d also like to understand that!
The message error is There is zero MOMENT everywhere in the model based on the default criterion.
I attached my INP file

I really appreciate any help

Buba

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