In reply to raja.kuraku:
Hi Raja,
You are setting only the interface into config_db from TB_TOP. I think if you are not setting the modport of the interface you cant get the same in your driver. Also your driver has m_if_h which is an instance of the modport of the interface and not the interface alone. Hence try changing the code in TB_TOP as:
uvm_config_db#(virtual interface.drv_modport)::set(null,“*”,“vif”,if_h);
Let us know if that works…