Ply Stacking optimization ending without feasible/ infeasible design

Hi Everybody,

after performing an optimization straight to the ply stacking optimization, this last step of optimization ended without a feasible or an infeasible design. The output-file its attached, so you can see for yourself. Surprising to me is, that the ply stacking order is being shuffled, thus the output file doesn't name it a feasible design. Besides the simulation was performed on the same model, only the starting plythicknesses of the laminate where change in order to make sure, I am optimizing a global optimum.

I hope you guys can help me.

Kind regards for your help in advance.

Dean 

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