When trying to use Automatic Wire Number, nothing happens or nothing changes after clicking OK.
The Automatic Wire Number tool doesn't overwrite the existing wire labels unless told to do so. Therefore when automatic wire numbering is used on the wires already having labels it doesn't change those labels, giving an impression that nothing happened or changed after running the automatic wire numbering command.
Automatic Wire Number does not assign numbers to wires without a connection to at least one device.
There may be filters applied preventing wire numbers from being assigned.