Would appreciate some help with CarrierRoute module I get the following error

ERROR:carrierroute:carrier_rewrite_msg: error during rewrite_uri_recursor

This is my Route

route[22] { # route calls based on hash over callid # choose route domain 0 of the default carrier if(!cr_rewrite_uri("0", "call_id")){ sl_send_reply("403", "Not allowed"); } else { # In case of failure, re-route the request t_on_failure("3"); # Relay the request to the gateway t_relay(); } }