convert odb to op2 (toOutput2)

Hello, I'm trying to convert *odb to *op2 by using toOutput2 converter. It works fine but only for one step when I run a model with many steps only one is exported to op2. When I request a certain step by -step X it exports requested one but I want to have all steps in one op2. Please give me a hint to solve this issue. Thank you.