Sure :-) I was trying to export my bugzilla data to mse, using the NestedExporter (my meta-model is still based on Meta and not on Fame) but I encountered a couple of problems. In the bug model, one of the properties is a collection of activities, which are modeled like: metamodelActivities ^(EMOF.Property name: #activity type: BugActivity multiplicity: #many) opposite: #bug; yourself on the BugActivity side I have: metamodelBug ^(EMOF.Property name: #bug type: Bug) opposite: #activity; yourself The problems I had were: - when I export, to have the activities on the mse I have to directly add them in the exporter (something like exporter addAll: (bugs flatCollect: [:e | e activities]) ), even if they are parts of bug - in exporting both bugs and activities, data type declared as Timestamp, Text and others are not written in the mse. Only the idref is written. Something like: (Smalltalk.Churrasco.Bug (id: 125) (activity (idref: 126) (idref: 127) (idref: 128) (idref: 129) (idref: 130)) (component 'User Assistance') (creationTS (idref: 131)) (deltaTS (idref: 132)) Where creationTS and deltaTS are declared as Timestamp in the metamodel. Note that the id mentioned in the idref (for example 131) do not appear in the mse. Maybe the problem is something in #isNested: of the NestedExporter? Thanks and cheers Marco On Dec 2, 2008, at 9:48 AM, stéphane ducasse wrote: