Before starting tonight, we copied two frames from last night's good seeing run to /data/photo/optics/52144. We don't know if these are the absolute best seeing frames, but they should be quite good. We also ran skippy with -window options of 180 and 240" on last night's fated run and got identical results to last night -that is the increased search radius does not work to tell you if you really are qute far off in your pointing. Dan homed the secondary during the afternoon and found a single step error. Mike and French moved the telescope in altitude and foind no problems. During checkout, Dan found the DA in the same state as last night - this time, though waiting for a command response from id6, not id5. Mike had, however, already done a successful test bias -so again this happened either during or in between drifts. For the second night in a row, I am testing Landru with the new Xserver while NOT driving (for safety). Observers- you don't have to do anything to use the new setup. You will, however, note, that you have 4 window managers running (one in each screen) and cannot move windows from one screen to another. The mouse, however, does move from one screen to the other in the manner you would expect. Clouds at sunset (and moon) so first up: cart 7 plate 625. Tonight, the 72 point model worked (for this plate at least) with no offset. Dan's Mac got Landru-envy and decided to bail ot of X while he was centering the guide stars. He had to start over and do a new spectro bias, loadCart, and guiderFlat before he could get things going again. Sigh. Next up - cart 1 plate 635. Stars appeared on the first gotoField. This plate finished, we went on to cart 4 plate 377. Finding guide stars was hampered by clouds. They also put a damper on getting science exposures. The clouds eventually gathered somewhere where we were not pointing and we continued to get excellent S/N values. Incidentally, we declared the test version of IOP, v3_53_7 current tonight, since it has now been shown to take good imaging and spectroscopic data. Next up, cart 5 plate 653. gotoField immediately found guide stars. At 02:10, the telescope halted- the watcher told us 1) that the axes were halted by a problem (how I love that error message) and 2) Modu="prt Read" (Aug 24 02:09:54 MDT) Modu="axe i SchMove" (Aug 24 02:10:04 MDT) Modu="axe o Move" (Aug 24 02:10:04 MDT) Modu="exe Track" (Aug 24 02:10:04 MDT) Modu="prt ReadMatch" (Aug 24 02:10:04 MDT) almost as informative. The TCC reported: 0 0 I RotType="Obj" 0 0 I RotPos = -0.000475, 0.000000, 4505357364.85000 0 7 I SpiderInstAng = 19.787410, -0.004508, 4505357421.82235 0 7 : Cmd='show object' 0 0 F Modu="prt_ReadMatch"; Text="bad reply"; Expected="AZ MOVE 23.2759011 -0.0054147 29426.82235"; Received="199.69639 8 -1.845568 29415.647674 0 0.000000" 0 0 F Modu="prt_ReadMatch"; Text="bad reply"; Expected="ALT MOVE 44.3344544 0.0013911 29426.82235"; Received="AZ MOVE 2 3.2759011 -0.0054147 29426.82235" 0 0 F Modu="prt_ReadMatch"; Text="bad reply"; Expected="ROT MOVE 199.6451872 -0.0045090 29426.82235"; Received=" " 0 0 F Modu="axe_o_Move"; Text="command failed for AZ , ALT, ROT" 0 0 F Modu="prt_ReadMatch"; Text="bad reply"; Expected="AZ MOVE"; Received="ALT MOVE 44.3344544 0.0013911 29426.82235" 0 0 F Modu="prt_ReadMatch"; Text="bad reply"; Expected="ALT MOVE"; Received=" " 0 0 F Modu="prt_ReadMatch"; Text="bad reply"; Expected="ROT MOVE"; Received="ROT MOVE 199.6451872 -0.0045090 29426.82235 " We decided this exposure may be contaminated so decided not to count it in the final S/N tally. Next up - cart 3 plate 663. We got guide stars on gotoField after clearing the offsets from the previous plate. W later realized that this plate has some previous exposures on it - it will hve a REALLY GOOD S/N after tonight's addtional observations - especially since there are no later plates for us to do so we sat on it much longer than needed - to fill the time now, ccount for that in your metrics. Around 04:17, we noticed Dan's SOP had frozen and no guide updates were happening.It looks like things have been frozen for the past 8 minutes. The "unexpected" logTool murmur section showed nothing revealing (no entries at all since 04:00.) Further murmur-sleuthing revealed nothing further. Dan logged out the ports, opened a new SOP session, & took a bias -init which worked so presumably the previous SOP session died before it started the last exposure although the SOPGUI countdown timer had already counted down 97s. Once back in bidness, we took a smear exposure and an additional science exposure. The smear ran OK, but the science xposure finished without reading out. A hand- entered readoutBegin read out a line or so, but no more than that. So much for the extra S/N on this plate.