• By default, all members of the family are selected when you want to undo a checkout. You cannot exclude any member from the selection.

• When you undo an operation, CAD documents created for new instances are removed from the workspace.

• When you use Undo Check Out, it may cause new files (for example, instances) to be downloaded. You may then be prompted to replace the model in session. If this occurs, all members of the family must be replaced or none of them.