iraf.net

NUMBER:	481
MODULE:	mscred.combine (flatcombine, etc.)
SYSTEM:	V4.3: February 8, 2001 - V4.4: March 6, 2001
DATE:	Tue Mar 20 10:20:33 MST 2001
FROM:	valdes

BUG:	When using scaling or zero offsets the normalization of the factors
	may be incorrect.  This bug is compiler dependent and affects
	PC-IRAF (Suse and Redhat were explicitly checked) but not Solaris
	or Alpha.  What is intended is that the scale and zero factors be
	normalized to the first image.  The incorrect behavior is that only
	the first image is normalized.  What you see in the terminal and
	logfile report on the scale factors is the first image has a
	scaling of 1 and offset of 0 and the other images have values which
	are not correct and usually appear grossly wrong.  There is no
	workaround when scaling is needed.  A new version of MSCRED is
	required.

STATUS:	Fixed in V4.4: March 20, 2001.