As you can see via the following screen shot from my logs, my zwave discovery stops after around 20 seconds (no matter what it says on the add device screen).
Have you tried shutting down the hub, remove power for 10 seconds, and restarting it. Zwave radio probably got itself into a bind, that will allow it to power down and restart.
It probably means the ZWave radio is in need of a reset. You must power down the hub to achieve a Z-Radio reset. Settings: Shutdown -- wait for the message or Red LED. Pull the power and wait 10 seconds, power up, try to Include again.
A reminder... Exclude before Include is a technique that reduces the chance of a Ghost.
Good Question, if those numbers are the actual error codes.
Here is the document that I found:
However, I did find a device that was included without a name (which always indicates to me a potential ghost). Fortunately, I was able to use the "remove" button to get rid of it.
They got added during C-7 days if I remember right.. when the 700 series chip had it's teething pains. They may just be direct expressions of what the Chip sends, but historically those kinds of chip status's lean towards bitwise vs numerical sequence.