The task must be in the PENDING or RUNNING state.
PENDING
RUNNING
public CancelExportTaskResponse CancelExportTask(CancelExportTaskRequest request) { var marshaller = new CancelExportTaskRequestMarshaller(); var unmarshaller = CancelExportTaskResponseUnmarshaller.Instance; return Invoke<CancelExportTaskRequest,CancelExportTaskResponse>(request, marshaller, unmarshaller); }