[BTS] EXCEPTION OBJECT_UNKNOWN RAISED

Today, I generate a RFC schema, an error throwed by WCF-SAP adapter wazard.

Microsoft.Adapters.SAP.RFCException: Details: ErrorCode=RFC_EXCEPTION. ErrorGroup=RFC_ERROR_APPLICATION_EXCEPTION. SapErrorMessage=EXCEPTION OBJECT_UNKNOWN RAISED.  AdapterErrorMessage=Error returned by RfcCallReceiveEx while calling RFC: IDOCTYPE_READ_COMPLETE..

Server stack trace:    at Microsoft.Adapters.SAP.RFCException.HelperThrow(Int32 retCode, String additionalErrorMessage)    at Microsoft.Adapters.SAP.RfcOutboundInvoker.Invoke()    at Microsoft.Adapters.SAP.InternalIdocMetadata..ctor(String idocType, String cimType, String release, String version, MetadataLookup metadataLookup, SAPConnection sapConnection, TimeoutHelper timeoutHelper)    at Microsoft.Adapters.SAP.SAPMetadataContract.ResolveTypeMetadata(String typeId, TimeSpan timeout, TypeMetadataCollection& extraTypeMetadataResolved)    at Microsoft.ServiceModel.Channels.Common.Design.MetadataCache.GetTypeMetadata(String uniqueId, Guid clientId, TimeSpan timeout)    at Microsoft.ServiceModel.Channels.Common.MetadataLookup.GetTypeDefinition(String typeId, TimeSpan timeout)    at Microsoft.Adapters.SAP.SapIdocMetadata..ctor(String absName, String idocType, String cimType, String release, String version, SAPConnection sapConnection, Boolean generateFlatFileCompatibleIdocSchema, Boolean segmentTypeInFlatFileAnnotation, MetadataLookup metadataLookup, TimeoutHelper timeoutHelper)    at Microsoft.Adapters.SAP.SAPMetadataContract.ResolveTypeMetadata(String typeId, TimeSpan timeout, TypeMetadataCollection& extraTypeMetadataResolved)    at Microsoft.ServiceModel.Channels.Common.Design.MetadataCache.GetTypeMetadata(String uniqueId, Guid clientId, TimeSpan timeout)    at Microsoft.ServiceModel.Channels.Common.MetadataLookup.GetTypeDefinition(String typeId, TimeSpan timeout)    at Microsoft.Adapters.SAP.IdocOperationMetadata.ExportXmlSchema(XmlSchemaExportContext schemaExportContext, MetadataLookup metadataLookup, TimeSpan timespan, OperationParameterDirection direction)    at Microsoft.Adapters.SAP.IdocOperationMetadata.ExportInputXmlSchema(XmlSchemaExportContext schemaExportContext, MetadataLookup metadataLookup, TimeSpan timespan)    at Microsoft.ServiceModel.Channels.Common.Design.WsdlBuilderHelper.AddOperationSchema(OperationMetadata operationMetadata, TimeSpan timeout)    at Microsoft.ServiceModel.Channels.Common.Design.WsdlBuilder.SearchBrowseNodes(MetadataRetrievalNode[] nodes, WsdlBuilderHelper helper, TimeoutHelper timeoutHelper)    at Microsoft.ServiceModel.Channels.Common.Design.WsdlBuilder.GenerateOperationSchemas(WsdlBuilderHelper helper, MetadataRetrievalNode[] nodes, TimeSpan timeout)    at Microsoft.ServiceModel.Channels.Common.Design.WsdlBuilder.GetWsdl(MetadataRetrievalNode[] nodes, Uri uri, TimeSpan timeout)    at Microsoft.Adapters.SAP.SapCustomWsdlRetrieval.GetWsdl(MetadataRetrievalNode[] nodes, Uri uri, TimeSpan timeout)    at Microsoft.ServiceModel.Channels.Common.Design.MetadataExchanger.ProcessMetadataGet(Message message, Uri target, TimeSpan timeout, MetadataLookup metadataLookup)    at Microsoft.ServiceModel.Channels.Common.Design.MetadataExchanger.ProcessMetadataMessage(Message message, Uri target, TimeSpan timeout, MetadataLookup metadataLookup, Message& replyMessage)    at Microsoft.ServiceModel.Channels.Common.Channels.AdapterRequestChannel.Request(Message message, TimeSpan timeout)    at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)    at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)    at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)    at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:    at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)    at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)    at Microsoft.ServiceModel.Channels.IMetadataRetrievalContract.GetMetadata(MetadataRetrievalNode[] nodes)    at Microsoft.ServiceModel.Channels.Tools.MetadataSearchBrowse.MetadataPanel.GetWsdl(MetadataRetrievalNode[] nodes)    at Microsoft.ServiceModel.Channels.Tools.MetadataSearchBrowse.MetadataUserControl.GetWsdl()

How to fix it?

I ask a friend he is a SAP specialist. After check and check, debug and debug, we found the root cause.

In SAP, a IDoc include Partner/MessageType/Basic Type/RFC Destination/ProgramID. In this case, SAP lost declare Basic Type, then BizTalk could not generate the schema.