TWS_INVALID_REQID
if ( req_id == TWS_INVALID_REQID ) {
if ( reqid != TWS_INVALID_REQID && reqid == req->request_id ) {
*req_id = TWS_INVALID_REQID;
if ( req_id == TWS_INVALID_REQID ) {
return(TWS_INVALID_REQID);
return(TWS_INVALID_REQID);