I am getting the below error while executing template builder for page template.

System.Web.Services.Protocols.SoapException: Internal error: Session id 'a64a9700-0a73-4963-936c-143bcd1e6529' is unknown

at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at Tridion.ContentManager.Templating.CompoundTemplates.DomainModel.Proxy.CompoundTemplateWebService.GetDebuggingState(String debuggerSessionId, String lastLogMessageId) at Tridion.ContentManager.Templating.CompoundTemplates.DomainModel.DebugObject.Start(Template template, Object debugItem, LoggingOptions loggingOptions)

I am using Template Builder 7.1 for Tridion 2013 SP1.

Can you please help me to resolve the above issue.

2 Answers 2


We have the same issue when our system is load balanced. You will need to connect to a particular node of your Content Manager when using TB. Otherwise your session changes to your other node, and then you get this error. Hope this helps.


Have you tried restarting Template Builder? Have you tried running an IIS reset?

  • Sorry for late reply, I did all above steps still issue exists Oct 14, 2014 at 23:03

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