syntax error, unexpected keyword_do_block

gistfile1.txt

  def consulta_cpmrc(ref)
    client = Savon.client("http://WHATEVER")
    response = client.request :consulta_cpmrc, do     # <- This line throws the error
      soap.body = {
        "Provincia" => "",
        "Municipio" => "",
        "SRS"       => "EPSG:4258",   
        "RefCat"    => "#{ref[0..13]}"#"6447903UF6564N"# son los 14 primeros caracteres
      }
    end