About 10 years ago I was working for one of the Big 4 banks here in Australia, doing 3rd level support. An issue came up with, if memory serves, Siebel. Desktop

About 10 years ago I was working for one of the Big 4 banks here in Australia, doing 3rd level support. An issue came up with, if memory serves, Siebel. Desktop issue, don't remember the details, but it was pretty serious - a team couldn't do the thing that they do. I was on this thing for weeks. Hacking away in whatever that tool from sysinternals was called (Procmon?), monitoring calls at the process level, running multiple tests on multiple machines, the whole lot. It's the most complex troubleshooting I've ever done. I found nothing. The guys in the team were in an office a few miles away from me so one day I said, hey, I'm going to come down. I need to see this with my own eyes rather than over a remote connection. I went down there. We started up the desktop. They launched the software. They clicked the button to do The Thing That Wasn't Working. And it worked. It just did the thing it was meant to do. And the problem never came back.