The adapter failed to transmit message going to send port "SendPort25" with URL "mssql://xxxxxxxxx". It will be retransmitted after the retry interval specified for this Send Port. Details:"System.ArgumentNullException: Value cannot be null.
Parameter name: key
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.CreateChannelFactory[TChannel](IBaseMessage bizTalkMessage)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.InitializeValues(IBaseMessage message)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2..ctor(IBaseMessage message, WcfTransmitter`2 transmitter)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfTransmitter`2.GetClientFromCache(String spid, IBaseMessage message)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfAsyncBatch`2.BatchWorker(List`1 messages)".
BizTalk