Hello Mike thx for your reply. In the UIInput class I set a breakpoint in the method getConvertedValue(). The detail message of the thrown converter exception is: javax.faces.el.PropertyNotFoundException: Base is null: .selectedUser
I'm not sure what this exactly means. Looks for me that there is no instance of the class selectedUserBean avaliable. But this class is in session scope and should always be accesible... My handmade stacktrace: Class: PropertyResolverImpl Method: getProperty the invoke returns null Class: PropertyResolverImpl Method: getValue returns null InnerClass: MyPropertySuffix in ELParserHelper Method: evaluate returns null Class: ValueBindingImpl Method: resolveToBaseAndProperty throws PropertyNotFoundException Class: RendererUtils Method: getConvertedUIOutputValue throws ConverterException Class: UIInput Method: getConvertedValue finally produces the conversion error during model update Hope that thew JSF guys implement a propper exception handling in jsf 1.2;-) -- View this message in context: http://www.nabble.com/Converter-error-during-Model-update-t1296244.html#a3464618 Sent from the MyFaces - Users forum at Nabble.com.

