Hi, in a MADateDescription I set a component class derived from MATextInputComponent. The renderEditorOn: methode split the Date in day, month and year and store this parts as instance variables. Then the methode create the input fields for DD MM YYYY and a hiddenInput: html hiddenInput callback: [ self value: (Date fromString: month asString, '.', day asString, '.', year asString ). ]. Its works fine, but now I like to add a error handling to deal with invalid dates like "30.02.2007". In other cases I use the MADescription>>addCondition, but in this case I have no access to the three parts of Date (DD MM YYYY) ... ... error in reasoning? salute Thomas -- View this message in context: http://www.nabble.com/-MA--Error-handling-in-MADateDescription-componentCla… Sent from the SmallWiki mailing list archive at Nabble.com.