I caught another such error in my SOAP Log this morning, although this time the error returned before any results.
I'd really appreciate it if you could take a quick look and let me know what you think.
Many thanks.
HTTP/1.1 500 Internal Server Error
Content-Type: text/xml; charset=UTF-8
Date: Thu, 28 Aug 2014 09:28:48 GMT
Expires: Thu, 28 Aug 2014 09:28:48 GMT
Cache-Control: private, max-age=0
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Server: GSE
Transfer-Encoding: chunked
<?xml version="1.0"?>
<soap:Header>
<requestId>000501ad297264b00a4254a6960046b8</requestId>
<serviceName>MutateJobService</serviceName>
<methodName>mutate</methodName>
<operations>0</operations>
<responseTime>8909</responseTime>
</ResponseHeader>
</soap:Header>
<soap:Body>
<soap:Fault>
<faultcode>soap:Server</faultcode>
<faultstring>[InternalApiError.UNEXPECTED_INTERNAL_API_ERROR @ com.google.ads.api.services.common.error.InternalApiError.<init>(InternalApiErro]</faultstring>
<detail>
<message>[InternalApiError.UNEXPECTED_INTERNAL_API_ERROR @ com.google.ads.api.services.common.error.InternalApiError.<init>(InternalApiErro]</message>
<ApplicationException.Type>ApiException</ApplicationException.Type>
<fieldPath/>
<trigger/>
<errorString>InternalApiError.UNEXPECTED_INTERNAL_API_ERROR</errorString>
<ApiError.Type>InternalApiError</ApiError.Type>
<reason>UNEXPECTED_INTERNAL_API_ERROR</reason>
</errors>
</ApiExceptionFault>
</detail>
</soap:Fault>
</soap:Body>
</soap:Envelope>