[Moose-dev] Moose meta-model extension

Hi, I'm writing to this mailing list for the first time, so let me shortly introduce myself: I'm a PhD student at SCG (prof. O. Nierstrasz / University of Bern) and i'm currently working on architecture validation. I recently started a little project (a more flexible and generic version of moose chef), and since i wanted to display my output in moose i tried to build an extension to the moose meta-model. What i did was creating a new class named FAMIXLiftedAssociation which extends FAMIXAssociation and has a 'from' and to 'to' attribute. I defined the following methods: to <MSEProperty: #to type: #MooseEntity> <MSEComment: 'to-side of the association'> ^ to. from <MSEProperty: #from type: #MooseEntity> <MSEComment: 'from-side of the association'> ^ from where both 'from' and 'to' attributes are MooseEntity objects. On the class side i redefined: annotation <MSEClass: #FAMIXLiftedAssociation super: #FAMIXAssociation> <package: #FAMIX> ^self When i try to browse a group populated with instances of the above described class, i'm able to see them all correctly. But as soon as i click on one of them i get the following error: MessageNotUnderstood: receiver of "allPrimitiveAttributes" is nil I guess the new class has not been recognized as being part of the moose meta-model. Am i wrong ? Did i forget any pragma ? Andrea Caracciolo