MDM Trouble Report for 2015 Dec 13 Telescope: 2.4m Observer(s): Stephen Lawrence (Hofstra/Columbia) Instrument: OSMOS (imaging mode) Problem(s) Encountered: The only serious problem was in the afternoon of 12/13, when I was attempting dome flats. The mirror cover petals closed in the wrong order. Eric G. talked me through the procedure to get them to open again, and I was ready to go before sunset. The TCS control GUI window crashed twice, but restarted smoothly. The OSMOS instrument status window reported losing the link to the TCS information twice, both times immediately after running a 'call roiXk' to change the region of interest on the chip, but the 'tcsinit' and 'tcstatus' commands fixed that. ------------------------------ Submitted on 2015 Dec 14 [9:07:00]