Hi guys, when a user submits the save button <tf:transitionButton transition="Update Date" value="Save"/> I would like the system to compare the entered date with a process variable representing a date so a jpdl-buildin converter does not fit . The application is supposed to show an error message and not to submit the form. How is it to implement? Do I need an ActionHandler? How to tell the application to stay at the form? Thx for help, Tina View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4147479#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...