Hi All, i see my last message "descriptionContainer addCondition" in the wiki are wrong formatted. I resubmit the message. I have define descriptionContainer with addCondition to mange the control of the data to dictionary. The definition is: descriptionContainer ^( super descriptionContainer) addCondition:[ :memento | ( self controlToDataBase: memento)] labelled:' Member not definable'; yourself It work fine. But when create the component with: self call: ( ModelClass descriptionFieldOne, ModelClass descriptionFieldTwo, ModelClass descriptionFieldThree ) asComponenetOn: anModel) addValidateForm; yourself the descriptionContainer addCondition d'ont work. Thanks for any consideration, Dario