Whats wrong with my releases?

[jokiller70]

As soon as i add releases i get "no convergence of nonlinear problem" and "the instabillity ( 2 type)"

Why?

[Pawel.Pulak · Accepted solution]

The instabilities and no convergence were resulting from not defining points for zero displacements and rotations in non-linear functions used in releases.

It is enough to add (0;0) points to obtain convergent analysis.

I have shown one such example on the screen capture below:

I have also registered a change request to make the solver less sensitive to such syntax nuances or to report some warning in such case.

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Regards,