*Error:*
Method setViewModel not found for class org.zkoss.zul.Window

*Reason*
Missing closing paranthesis for @init.

*Bad:*
<window title="Search" width="600px" border="normal"
        apply="org.zkoss.bind.BindComposer" viewModel="@id('vm') @init('com.example.SearchVM'">

instead of
*OK:*
<window title="Search" width="600px" border="normal"
        apply="org.zkoss.bind.BindComposer" viewModel="@id('vm') @init('com.example.SearchVM')">