Comment #3 on issue 747 by andreho...(a)gmail.com: We should have set methods for all properties http://code.google.com/p/moose-technology/issues/detail?id=747 Doru, think in this case: You export a filtered model with Classes and Namespaces. Then you lose information about other entities what is OK (but you don't want to lose information about Classes and Namespaces, at least primitives properties). As consequence, it will not be possible to recompute derived properties..

Updates: Status: WontFix Comment #5 on issue 747 by andreho...(a)gmail.com: We should have set methods for all properties http://code.google.com/p/moose-technology/issues/detail?id=747 Yes, indeed. ps: I was working in a modified image where it was possible to save all derived properties, and then I needed setter methods.