Error in process <0.105.0> with exit value: {badarg,[{erlang,register,[pong,<0.116.0>]},{tut16,start,0},{erl_eval,do_apply,5},{shell,exprs,6},{shell,eval_loop,3}]}

** exited: {badarg,[{erlang,register,[pong,<0.116.0>]},
                    {tut16,start,0},
                    {erl_eval,do_apply,5},
                    {shell,exprs,6},
                    {shell,eval_loop,3}]} **