Hi, “context.installattributehandler” has to be changed to “context.installstyleandcolorhandler” function namespaces.define(namespace,settings) … local style = ns.style if style == v_yes then -- context.installattributehandler(self,name) context.installstyleandcolorhandler(self,name) if trace_namespaces then report_namespaces("installing attribute handler for '%s'",name) end end … end Wolfgang