I thought: Okay lets update this open source software the day right before my exam. What could go wrong? All previous updates worked without a problem and this is an urgent security fix for RCX.

Of course: It failed. I spend the whole night searching for the error in my config files etc. The error was: A missing null check in start sequence. Had to fix and build it myself as I required the files stored there for the exam.

I learned a lot that day/night about updating only when you have the time to deal with errors...