A couple years ago I was at the Virginia DMV along with about 50 other people doing DMV things when all of a sudden someone comes out from the back and gets in front of all the service windows and announces "The DMV is now closed for the day due to a computer problem. Please leave now."

Some of the people in that crowd had driven hours to get there.

That's why the person who made the coding error should have been disciplined.

How do you determine it was the person who had done the "coding error"s fault?

Sounds to me they are seriously underfunded and you are pointing the blame at an individual in a systemic issue.