add_line - transmition line - breaker

I tried to connect "Transmition line" wih "Breaker" using add_line command add_line(model,"Trans_line/1","BreakerA/1","autorouting","1"); but i get an error that the port is not existing, but same command before ceat a connection - Breaker- subystem without any problem.

Is there some other possibility to make the connection, or the command is not good?