HTTP/1.1 400 Bad Request
x-amzn-requestid: 3c9617bf-322e-11e2-b458-9949c02a6feb
content-type: text/xml
content-length: 377
date: Mon, 19 Nov 2012 09:48:13 GMT

<ErrorResponse xmlns="http://cloudsearch.amazonaws.com/doc/2011-02-01">
  <Error>
    <Type>Sender</Type>
    <Code>ValidationError</Code>
    <Message>1 validation error detected: Value null at 'indexField.indexFieldType' failed to satisfy constraint: Member must not be null</Message>
  </Error>
  <RequestId>3c9617bf-322e-11e2-b458-9949c02a6feb</RequestId>
</ErrorResponse>