The exception that is thrown when referencing an object that is no longer valid.
Assembly: RevitAPI (in RevitAPI.dll) Version: 220.127.116.11 (18.104.22.168)
The object may no longer exist for many reasons:
- The object was explicitly deleted from the database.
- A change to other database items caused the item to be automatically deleted from the database.
- The object no longer exists as its creation was undone (by rolling a transaction back).