When an operation fails, an error response will be provided. This includes an error code and a text message. The <response> element will contain the two elements:

• A <result> element containing the EPP error code. The codes used by our EPP server are described here.
  
• A <trID> element.

• A <code> attribute giving the EPP error code
• A <msg> element giving the EPP error message
• An optional <extValue> element giving further information about the error where available. This is described below.

• A <value> element that contains the element that has caused the problem
• A <reason> element that contains the Nominet V*** element

Example error message

<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nominet.org.uk/epp/xml/epp-1.0 epp-1.0.xsd">
  <response>
    <result code="2302">
      <msg>Object exists</msg>
      <extValue>
        <value>
          <contact:id
            xmlns:contact="urn:ietf:params:xml:ns:contact-1.0"
            xsi:schemaLocation="urn:ietf:params:xml:ns:contact-1.0 contact-1.0.xsd">
            S66TA01
          </contact:id>
        </value>
        <reason>V279 Account S66TA01 exists already.</reason>
      </extValue>
    </result>
    <trID>
      <clTRID>EPP-66-C02</clTRID>
      <svTRID>100663</svTRID>
    </trID>
  </response>
</epp>