At the start of the night we had problems with the display of the slit image on ds9. The slit was barely noticeable and we had to increase the acquisition times with respect to the night before (from 1 to 3 seconds) and it seems that there is some noise background.  There is also a problem with koffset3, when it gives the second offset that should be smaller it gives values around 290. However the stars were always in the slit using just the first offset. And finally the calibration lamp (CuHeAr) also has a problem. We took the first one at the start of the night and it was ok, but then during the night the following lamps didn't have enough counts and checking with the first one (and the ones we took last night) the intensity of the lines and also the positions weren't the same, it looks like a different lamp and it looks a lot more like the HeNeAr lamp (we checked this with the lamps we took from the previous run that were HeNeAr). Please check the lamp :-)