Thank you for your reply.

Did you encounter any problem like this  "[Sim2000] Error - FEA1: ERROR - could not find a transient operating point before launching Maxwell >> Calculate at t=0.0005" when doing your cosimulation? 

I did try changing the time steps.The required time step was very small which took ages to solve. Do you have any idea about this one? 

I would be glad to hear your response.

Thank you