throw new EC2ServiceException( ClientError.MissingParamter,
"Missing parameter - InstanceType/UserData should be provided");
}
// -> execute the request
ModifyInstanceAttributeResponse EC2response = EC2SoapServiceImpl.toModifyInstanceAttributeResponse(
ServiceProvider.getInstance().getEC2Engine().modifyInstanceAttribute( ec2Request ));
serializeResponse(response, EC2response);
}