Hi, I found this method: allFileAnchors ^self allWithSubTypesOf: FAMIXFileAnchor The problem is that FAMIXIndexedFileAnchor are also a kind of file anchor. Should I replace it by allFileAnchors ^self allWithSubTypesOf: FAMIXAbstractFileAnchor ? -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques Prévert 01, 59650 Villeneuve d'ascq France