Hello, Any problem if I change the implementation of --- FAMIXFileAnchor>>rootFolder ^ self mooseModel rootFolder --- to --- FAMIXFileAnchor>>rootFolder self mooseModel ifNil: [ ^ '' ]. ^ self mooseModel rootFolder --- The problem is that when mooseModel is nil (ie, when working with FAMIX-only), there will be an exception. FAMIXFileAnchor is depending on moose. What do you think? best regards, -- Andre Hora