I have a stepped column which I am trying to run a linear buckling analysis on. I used a fixed hinge constraint at one end and at the other end I use a remote load with the displacement option. I dont allow any DOF except rotation and travel along the axix of the column. The constraints look correct, although the analysis never completes saying the matrix is sparse and possibly too few constraints. Can anyone hlep and point me t what I may be doing wrong? Pics attached./ FYI I am trying to get this to run a constant xsec column first and then try my stepped column.