Troubleshooting guide

Figure 2. Fiber optic converter boxes below MCE4 (left panel) and below perle (right panel)
c) Problem: The image acquisition counts past the exposure time without reading out an image.
Solution: This problem rarely happens anymore. With our previous slower version of flamingos1a, it
would sometimes take an extra 5 to 10 seconds to finish reordering the pixels, i.e., applying the look up
table, or LUT, before it writes the image to disk. In the MCE4 daemon window you sould see string of
dots being printed out during the apply lut phase:
UFEdtDMA::applyLut> . . . . . . . . . .
You should watch for several seconds to see if this line is present, and that it is printing additional dots.
When it finishes, it should also print something similar to:
UFEdtDMA::takeAndStore> close mmap file:
/data/4mguest/Test/test.0002.fits
UFEdtDMA::> completed: 1 -- /data0/4mguest/Test/test.0002.fits
ufgtake> acquired frames: 1
UFEdtDMA::takeAndStore> close mmap file:
/data/4mguest/Test/test.0002.fits
UFEdtDMA::> completed: 1 -- /data0/4mguest/Test/test.0002.fits
ufgtake> acquired frames: 1
If this never appears, try typing ufstop.pl -stop -clean at a flamingos1a prompt. Then try taking
another image; if that fails see if ping perle returns with the message that the perle is alive. If the
perle is alive, try rebooting MCE4 and reinitializing. If that completely fails, call for help.
d) Problem: A large number of error messages are printed out either when trying to move a wheel (e.g.,
with config.filter.grism.decker.wheels.pl), or during the first part of an image
acquisition, where it sends commands to MCE4.
Solution: It's possible that the perle (formerly, iocomm) has crashed, or is very confused. Try ping
perle from flamingos1a; if there is no response, it needs rebooting. Even if there is a response, it may
be advisable to reboot it. To do this telnet baytech, userid perlepow password ______. At the
prompt type reboot 1, and then type logout when the prompt returns (e.g., see the example output in
3a, above). Now you must close all three daemons (Temperature, Motor, and MCE4) and the
record_temperatures window and run initflam.pl.
5) Problems when running config.filter.grism.decker.wheels.pl or config.mos.wheel.pl. The script ends by
FLAMINGOS@4-m, Ver. 2.34, 2006 Apr 04 Page 35 of 44