Hi! I am creating a Product with several ZClasses based on ZObjectManager. Most of these are nested classes, so that class b is defined within class a and thus class b is only available in an instance of class a for addition. So far so good, but my problem is that within an instance of class b there should be other instances of class b and this only works if I create class b in the Product folder. There are several such cases and my selection of possible classes to add gets very large and is not manageable... Sadly I can not add class b as valid subobject - it does not show up on that list... I am now trying to override all_meta_types but I am currently not sure where to get the meta_data info from... Is there any way around this? Thank's in advance, Martin