# ResponseMessages The response of a request should always contain a DeviceIdentification and CorrelationUid which is used in the response request. Assertions validate if there is a 'SOAP Response' received, if the response is 'Schema Compliant' with the WSDL and if there has been a 'not SOAP Fault'. The last one occurs when a fault code is returned. Possible faults are connection timed-out, SmartMeter could not be found, TCP-IP connection error or Correlationuid is unknown. The faults can be among others a FunctionalFault or TechnicalFault. Responses to a bundle request may include faults in the form of FaultResponseData, resembling the other faults. The format of these faults is described in the [common.xsd](https://github.com/OSGP/open-smart-grid-platform/blob/development/osgp/shared/osgp-ws-smartmetering/src/main/resources/schemas/common.xsd). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://grid-exchange-fabric.gitbook.io/gxf/domains/smartmetering/responsemessages.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.