Hey, I am going to update here because I ran into the same problem and hit a solution after a lot of trial and error. The things that solved it for me was to use the PBARL property card instead of the PBAR property card. I am hoping there is an analogous card called PBEAML as well. After this make sure that you are using the "Standard section Library" = Optistruct, this should give you the Von Mises for 1D elements. <If posting a screenshot on this forum were easy I would post one> Make sure yo have the Stress = Yes output request switched on of the load step.