Sign in with Microsoft
Sign in or create an account.
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.


When a BizTalk WCF-SAP adapter client is running BAPI transactions, and the WCF-SAP adapter throws exceptions, you notice that the adapter client eventually runs out of connections over time, and the following error message is generated:

SAP.Middleware.Connector.RfcResourceException: Unable to allocate client in pool [NAME=<NCoConnectionName> USER=<UserName> CLIENT=<ClientId> LANG=<LangName> ASHOST=<ASHOST> SYSNR=<SYSNRNum>] -- peak connections limit <MaxConnectionCount> exceeded


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


This problem is fixed in the following cumulative update for BizTalk Server:


For information about the service packs and cumulative update list for BizTalk Server, see the following article in the Microsoft Knowledge Base:

2555976 Service pack and cumulative update list for BizTalk Server

For more information about BizTalk Server hotfixes, see the following article in the Microsoft Knowledge Base:

2003097 Information about BizTalk hotfixes and Cumulative Update support

Third-party information disclaimer

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.

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!