Nonlinear buckling analysis in CREO

Hello, I'm trying to set up a non-linear buckling analysis in CREO.

So far I have been successful in analyzing a cantilever steel column, but I am only able to predict elastic buckling loads.

The actual buckling load needs to be obtained from a nonlinear buckling analysis, and should be smaller than the value predicted by elastic buckling analysis. 

Is anybody aware of a CREO tutorial so I can learn how to set up this type of nonlinear problem? 

Thank you, any help it's very much appreciated