Mike Rife
Ansys Employee

Hi BillHerbstritt

It would help to see the solution commands for both the static and eigenbuckling analysis used.  You can find an example of this in the MAPDL Help; chapter 9.6 of the Structural Analysis Guide (examples of pertubation analyses).  There is a eigenbuckling example but watch out as there are 3 cases listing in the same example.  3 different options of setting this up and I think you are looking for case 2.