Symptoms
When you change the ConnectorType property on a WCF-SAP send port in BizTalk Server, the port fails at runtime and you may receive an error message that resembles the following:
A message sent to adapter "WCF-SAP" on send port "SAPSP" with URI "sap://CLIENT=###;LANG=EN;@a/sapserver/##?RfcSdkTrace=False&AbapDebug=False" is suspended. Error details: System.NullReferenceException: Object reference not set to an instance of an object.Server stack trace: at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)at System.ServiceModel.Channels.ServiceChannel.EndRequest(IAsyncResult result)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 System.ServiceModel.Channels.IRequestChannel.EndRequest(IAsyncResult result)at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.RequestCallback(IAsyncResult result)
Additionally, the ConnectorType change does not take effect even after the configured cache refresh interval.
Resolution
Cumulative update information
The fix that resolves this issue is included in the following cumulative update for BizTalk Server:
Note After you apply this hotfix, the host instance for the send port must be restarted for the change to take effect and resolve this error.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the service pack and cumulative update list for BizTalk Server.Learn about BizTalk Server hotfixes and cumulative update support.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
