I am using an algor FEA package from 1999 and I am unable to select the analysis type as ‘nonlinear stress with nonlinear material models’. How can I get about with this problem?
However the package is not supported any more so I doubt you will find anyone who can remember or be able to load up the software on current machines (if they still have it).
Do the other non-linear options work? Why not move to a newer release?