I always find difficult to deal with errors from conversion exit as they stick to the application and stop the navigation of application
e.g i have created a popup with element TABLE ,a field "Valid From" is used for date and it validates the data automatically because input help given is CALENDAR.If i enter a character in date field then it raises the error message but that error message stick to application and does not allow popup to close.Even if it closes , the error stick to the main application from where the popup is raised.
Please provide optimum solution to deal with errors from conversion exits.