
"driven by an equipment change issue"
I love that, I'm using that one next time!
So usual stuff, weekend upgrade change request was tested badly ( if at all ) when it went through UAT and when customers actually used it on Monday morning the system fell apart.
This morning we saw a certain well known bank did some upgrades on their SFTP servers over the weekend, they replayed old files from last month through amd left them in place, we nearly double processed our data if our autoprocess checks hadn't caught them when they came through!