When the search fails, an <error> node is returned with a code, and a description of the error.

Example:

<result xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

      xmlns:xsd="http://www.w3.org/2001/XMLSchema"

      xmlns="http://www.teradp.com/schemas/GN4/1/Results.xsd">

   <error code="1903" name="SearchMissingParameter"
           message="Search conditions: missing parameter 'Count' (ERR1903)" />

</result>