Intermittent "Invalid destination NCoConnection (DELETED)" error messages when a SAP Send port makes an RFC call to get open items

Applies to: BizTalk Server 2013 BranchBizTalk Server 2013 DeveloperBizTalk Server 2013 Enterprise

Symptoms


In Microsoft BizTalk Server 2013, an SAP Send port cannot complete an RFC call to get open items, and you receive the following error message:

SAP.Middleware.Connector.RfcInvalidStateException: Cannot get a client connection: invalid destination NCoConnection (DELETED)
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)\

Resolution


Cumulative update information

The fix that resolves this issue is included in the following cumulative updates for BizTalk Server:

Cumulative update package 4 for BizTalk Adapter Pack 2013

Cumulative update package 6 for BizTalk Server 2013 R2

Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.