iraf.net

NUMBER:	487
MODULE:	ccdproc
SYSTEM:	V2.11
DATE:	Thu Jul  5 08:35:00 MST 2001
FROM:	valdes

BUG:	When applying a dark count correction, the dark count calibration
	image is scaled to the data being calibrated using the ratio of
	the dark times.  The dark time for an image is the 'darktime'
	keyword and if this is absent 'exptime', where these may be
	translated to other keywords if a translation is given in the
	instrument file.  When a value for the dark time is found it
	is used without checking for zero values.  Therefore, if the
	dark count image has a dark time value of zero a
	floating divide or floating exception will occur.  The
	workaround is to edit the header to add the appropriate
	values.

STATUS:	In the next release an appropriate error message will be given.