How to get OP=MOD with Python script in Abaqus?

Submitted by mikechy on Mon, 04/27/2015 - 19:11

I have the fixed boundary conditions in the previous step. In the next step I need to modify BC. For this I use setValuesInStep in Python script, but get OP=NEW instead of OP=MOD, as I want. Any idea how to get the desired OP=MOD by using Python? Thanks in advance.