The Undo Check Out command allows you to reverse the Check Out command and return to the iteration which you had checked out. To access this command in SOLIDWORKS, select PTC Windchill > Undo Check Out. Alternatively, in the Windchill Workgroup Manager client, select File > Undo Check Out.

If you set the Undo Checkout Overwrite Local Content preference to false, during the Undo Check Out operation, the model content is not overwritten in the cache.

In SOLIDWORKS, the Undo Check Out action on the selected family table instances, reverses the checked out state of the generic and all the instances in the active workspace.

Even if the Independently Modify Instances preference is set to Yes in Windchill, the generic and all the instances are selected by default when you perform the Undo Check Out action.