nSo with 10 substeps, it did not converge, but you no longer get the excessive thickness change error.nMake sure the solution information folder has a 3 in the Number of N-R Force Plots to save.nShow the Newton-Raphson Force Convergence Plot. Does it looks like it was going to converge?nLook at the 3 N-R Force Plots, is the Maximum always in the same place?nShow a snapshot of the mesh around the N-R Maximum value.nThis is where you should add a mesh control to use smaller element size.nI thought you converted the solid model to a shell model. Are you meshing a solid in this model?.n