https://forums.autodesk.com/t5/robot-structural-analysis-forum/solver-for-non-linear-analysis/m-p/5566566#M66814 There is no "non convergence" in this model.<BR />I see it is not correctly reported in calculation note for nonlinear buckling case for model with buckling deformation. Wed, 01 Apr 2015 10:45:56 GMT Rafal.Gaweda 2015-04-01T10:45:56Z