Hi all, I've finally tracked down the bug that was preventing me from using copy/paste/rename with my ZClasses (_verifyObjectPaste exceptions). It's caused by the fact that I changed their meta type names after creation to allow them to be stored easily in a tokens attribute (I removed the spaces). The all_meta_types method used by verifyObjectPaste appears to return the original meta_type of a ZClass, even if you rename it, and so the comparison fails. This is because all_meta_types actually uses the 'add list name' of the factory, and changing this appears to work. I think it would good if the latter's importance it is hilighted - that it isn't just the text that appears in the 'Add Product List'. Regards, Ivan PS Yes, the above took 3 hours.