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Dear sir or madam,
1. i was using datapars and daofind tasks for find the coordinates and magnitudes of stars . It worked first. But now i am getting these errors when i give daofind comnand...
da> daofind
Input image(s) (050629_un02258+3918_3d002_c):
Output coordinate file(s) (default: image.coo.?) (050629_un02258+3918_3d002_c.coo.1): FWHM of features in scale units (2.7) (CR or value):
New FWHM of features: 2.7 scale units 2.7 pixels
Standard deviation of background in counts (1.) (CR or value):
New standard deviation of background: 1. counts
Detection threshold in sigma (4.) (CR or value):
New detection threshold: 4. sigma 4. counts
Minimum good data value (215.) (CR or value):
New minimum good data value: 215. counts
Maximum good data value (32000.) (CR or value):
New maximum good data value: 32000. counts
ERROR: Cannot open pixel file (den4900d)2. I was doing the image reduction exercise and got this message after giving "rfits fm92* 0 junk old+ " and "display m92006.imh 1" commands :ERROR: integer divded by zero

Check the value of your 'imdir' variable, i.e. "cl> show imdir" This is set in your login.cl file and is the directory where the pixel files for IMH images will be placed, but it must be writable by you on the machine. To put the pixel files in a 'pix' subdirectory of the headers, set the value as "HDR$pix/" The trailing '/' is required but the 'pix' directory will be created if needed. Edit your login.cl, or do it on the commandline as[code:1:4e171570fc]cl> reset imdir = "HDR$pix/"
cl> flpr 0 # zero, no oh
[/code:1:4e171570fc]The 'flpr' will reinitialize all tasks. Once changed, you'll need to recreate the .imh images from the .fits.Cheers,
-Mike