The CANCEL-GET ROIV request, by virtue of being sent to the VTAM topology agent from CMIP services, must refer to an existing, valid GET request. Two responses are generated, an ROER for the GET request that is referred to, indicating that the operation was cancelled, and an RORS for the CANCEL-GET request indicating that this operation was completed successfully. If the CANCEL-GET request is issued after the VTAM topology agent has processed the GET request, then the response to the CANCEL-GET request is an ROER, indicating that this operation could not be processed.