You can use the browser's View Page Source to check the hidden[1] fields before submitting the page. And increase the trace as well [2] .
Regards, Gilberto [1] http://click.apache.org/docs/click-api/org/apache/click/control/HiddenField.html [2] http://click.apache.org/docs/user-guide/htmlsingle/click-book.html#application-mode
