When a web.config entry is removed from SharePoint, particularly in a multi-server environment, null entries are sometimes left behind on the server. CorasWorks created a utility to clean up these entries, and with v11. This utility is now available as one of the tools in the CorasWorks Installation Manager.
1. In the Installation Manager, click on the Tools menu, and select Clean Null Web.config entries.
2. Very shortly, a message is displayed, stating “Null web.config entries cleaned.” Click OK.