Hi Sergio, so, if you edit a component.. say, header.. and you accidentally put This is one of the reasons for Pier-Admin - a separate admin interface that won't be effected by changes you make to the site. However without Pier-Admin, I guess it depends on how your site is configured - in PRDistribution based sites there is a separate template/environment which is used for system tools - so that if you mess up the main site's environment you can still use the management tools - search for senders of PRDistribution>>metaEnvironmentPage You could try using the Diff View to put back a previous version - but it will probably use you default environment (which appears to be broken) eg: http://localhost:8082/pier/system/components/header&view=PRDiffView where /pier/system/components/header is replaced with: /apath/to/component/which/is/broken Alternatively from an image you can navigate to any PRStructure instance within your kernel with something like: (((WADispatcher default handlerAt: 'pier') configuration valueAt: #kernel) root lookupPath: '/system/components/header') contents This will extract the kernel from the handler registered at /pier then lookup a path to a structure within the kernel at '/system/components/header' and display the contents. You can then replace the contents with: (((WADispatcher default handlerAt: 'pier') configuration valueAt: #kernel) root lookupPath: '/system/components/header') contents: 'fixed header' I'm sure with some experimentation you'll be able to fix it Nick