Is the analysis with non-linear material (plasticity) only possible with nlgeom or also with nlstat?

Hello,
I have nonlinear material (plasticity) in my Analysis and the deformation is very small. I would like to work with non-linear quasi-static Analysis. But if I start the solver Radioss 11.0 I receive the message: Non convergent nonlinear iterations for subcase 1
What is the reason for this message? Can I only solve the problem with a geometric nonlinear Analysis?

In addition their is an other problem. If I try to solve with linear Material and slide contact between two parts I receive a solution, but if I try to solve the same problem with frictional contact between the two parts (and nlstat) I receive the same message like before with the nonlinear material and additional suggestions. (The card image nlparm ninc-option 100.) I add the message and the options for the interface as a jpg-file. Do you have any ideas for my problem?
Prethanks for an answer and excuse me for my bad english.
Best regards
Kerstin