A few years back, NATS went down because a flight plan waypoint confused the system and it crashed. They had to manually find the problematic flight plan, remove it and start the whole system back up.

Considering the last issue they encountered, it looks like in more than one place, there is no error catching and graceful resolution for those errors.

I would assume a system of such importance to handle issues without hiccups and alert the operators of what did not work. Like “this input caused this problem”, not just crash.