Hi Ashish, 

I changed the " step selection mode" to "all" in the second model and the analysis was terminated at the beginning of the second load step. An error message said the TB command to define OELN was created in 1st step or sth, i did not take a screen shot of that. it seemd that i should not define the ANISO using TB again for all steps.

If the APDL command was set to "First", was the ANISO material only active in the first load step? 

I actually have 13 load steps, could you please tell me how i should set the ANISO material properly with the APDL command snipppet?

Thank you very much for your reply!