I sometimes get calls where people are throwing errors in TBC caused by a serial numbered entity that is referenced in the error or exception dialog. I get asked - “How do I find that entity to find out what it is and maybe delete it or modify it to correct the error that is getting thrown”
Here is how
Go to the command pane by pressing F12
Type Selectbyserial in the command line Enter
In the dialog that opens type in the serial number flagged in the error dialog
once selected you can see the properties of the object to determine where and what it is.
If you think you can do without it, Delete it, failing that at least you know what it is and where it is and you may know how it is being used in the project so maybe you can fix it
Hope this is helpful
Alan