Hi, I already asked the same question a few days ago. Sorry for this reply. Release 4.5B or 4.6C Materials are assigned to a class. With MM02, in the view Classification of the material info record, we can change the values of the characteristics. My question: is it possible to know who has created and/or changed this value and/or when? (as we can do it in the general data view) If yes, how? Thanks a lot If some additional information is missing, feel free to ask me.