Once you add a representation of an assembly or a part to a drawing, it remains in session until you explicitly remove it. If a drawing view refers to the particular simplified representation you choose to delete, the system does not allow you to delete it while the drawing is in session, and attempts to retrieve the master representation.

For assembly simplified representations, if you do remove a representation from session and delete it, then when you retrieve the drawing that has views that use the simplified representation that you deleted, the system prompts you to select an existing representation from the Open Rep menu, and assigns this representation to all views that previously referred to the deleted representation.

For a part simplified representation, if you remove a representation from a session and delete it, then you cannot retrieve the drawing that has views that use the deleted part simplified representations.

When removing representations from a session, if the removed representation is the current representation and is not the last representation of the drawing model in session, the drawing model stays as the current drawing model.

If the removed representation is the last representation of the drawing model in session, the drawing model is removed from the drawing. If the removed drawing model was the current drawing model, the system randomly selects a drawing model and sets it as the new current drawing model.