# Revision history [back]

You have to inform the binder the target (root) component for that binder in each zul page. If you omit this, it'll append the binder in the page, thus the error you're getting. Will be something like (not tested pseudo code read javadoc):

<?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit" root="wnd"?>

<window id="wnd" >components here...</window>