SystemC Simulation Info: (I804) /IEEE_Std_1666/deprecated: deprecated function: sc_set_default_time_unit Error: (E515) set default time unit failed: already specified In file: Info: (I804) /IEEE_Std_1666/deprecated: You can turn off warnings about IEEE 1666 deprecated features by placing this method call as the first statement in your sc_main() function: sc_core::sc_report_handler::set_actions( "/IEEE_Std_1666/deprecated", sc_core::SC_DO_NOTHING );