There were no faults that caused more than 2 hours downtime during period 46. If there is any specific issue to mention, then this would be some persistent low-level bugs with the new detector controller and software for ALFOSC. For completeness I add the main problem here.
On a fairly regular bases there is a problem with the connection to the detector control software data-base. A simple restart of the specific software program solves this problem. This normally takes only a few minutes, but in some cases several restarts of the program are needed. The problem is thought to be caused by some of the libraries of the relatively old computer and operating system used. We are planning to replace the computer and upgrade the operating system and we expect this will solve this problem.