Hi, nDid you find any solution to this problem of nonlinear buckling analysis for composite materials? I am stuck in this problem too.nI have been able to export the cdb file and import it into the external model & then into static structural but the cdb file doesn't contain the ply material information. And when I want to assign the ply materials in static structural, it doesn't accept any materials.nnUPDATE:nI have been able to solve it. You have to pass both the model and engineering data from the External Model like this:nn