IFS Connect (Apps10 Upd13) - REST sender - response code 404 not processed

When calling:

Plsql_Rest_Sender_API.Call_Rest_EndPoint_Empty_Body(
                                                             rest_service_ =>'search',
                                                             url_params_ => url_params_,
                                                             callback_func_ => 'my_util_api.my_callback_proc’
                                                             http_method_ => 'GET',
                                                             sender_           => 'CONNECT',
                                                             receiver_         => 'MY_RECEIVER’',
                                                             fail_notify_         => TRUE,
                                                             failed_callback_fun_ => 'my_util_api.rest_error',
                                                             accepted_res_codes_  => '200,404');

I get ‘No output from address line in previous chain link; cannot proceed.’

I originally tried this call without accepted_res_codes as I wanted it to callback rest_error on 404, but then attempted with the accepted_res_codes to see if that would work.  It works perfectly when the response code is 200 just not 404.

Any ideas on what I am doing wrong?