Some project items, for example, Script, Name Mapping and others are unique within a project. A project can only contain one item of these types. This message appears if you try to add this item to the project, but the project already contains an item of this type.

Message - The type of the element you are trying to add is element_type. An element of this type already exists. There can be only one element of this type in the parent node.

See Also