You can attach your notebook with code there.
I did now sawy your code or full trace.

If I were you, I would get exact line of code where you have error and remove that etinre dlt table section and chcek if this will be working.
Then i would add it back trying to resolve the error one by one, maybe you will find pattern.
But you can also attach your code (as file), so somone can import it and help you..