Error message: "Pipeline not found - missing a WaitForPostBack statement?"

Author: Kim Hornung
Posted: 6/21/2006 11:30:07 AM

Problem
Sometimes developers experience problems when deploying a solution from a test server to the production server.

One of the error messages that they might experience is the following (which in one specific case occured when trying to create new items in the Content Editor):

Pipeline "97BA74557D7B44B68F43B118B6449E8C" not found. (Are you missing a WaitForPostBack() statement?) (method: Sitecore.Web.UI.Sheer.ClientPage.OnPreRender(EventArgs e)).

Resolution
This error message occurs when the user's session for some reason is lost. It can also occur if Sitecore's pipeline has been modified.

Things to check for:
1) Is the server running Windows Server 2003? And is the "Web Gardens" setting for the application pool set to a larger value than "1"?
2) Is the client running load balancing software for the master server?
3) Has Sitecore's pipeline been modified?

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