When you add two items to a list with the same name, the model rolls back, a message warns that there are duplicate items, and neither item is added.
After you run an import, cell history displays a dimension change when there was no dimension change.
In certain circumstances, where a list has zero items, you cannot make it the first list in the Applies To field of a module. If you attempt to reorder lists as part of model synchronisation, the synchronization may be unsuccessful if the first list has no items.
When you export from a module filtered to cells that contain no data, the export is unsuccessful.
If a list subset is a parent of another hierarchy, and you delete an item, which is a parent of another list, within that hierarchy, the deletion takes longer than usual.
In the UX, when you copy or paste an item from or into a nested axis, it includes additional cells.
No meaningful error message is returned when an Optimizer action fails due to a variable having an infinite set of values.