MODULE: apphot.daofind
SYSTEM: V2.8
NUMBER:	120
MODULE:	apphot.daofind
SYSTEM:	V2.8
DATE:	Fri Mar 30 08:02:12 MST 1990
FROM:	davis

BUG:	In rare circumstances daofind may abort with a 'pixel file truncation
        error' when trying to read back the convolved images it has just 
	written. This only occurs on certain sized images and is due to
	the interaction of the read, write and boundary extension in image
	i/o. For example daofind works fine on a 640 by 1024 image but fails on
	one that is 641 by 1025 pixels.

STATUS:	The problem is fixed in 2.9. The solution was to add an imflush
	statement to flush the image i/o buffers after the write was
	complete and before initiating the read. There is no workaround.
	Contact the IRAF group for a fix.

NUMBER:	273
MODULE:	dopcor
SYSTEM:	V2.10.3BETA
DATE:	Wed Jan 18 17:22:38 MST 1995
FROM:	valdes

BUG:	For multispec spectra which have independent wavelengths for each
	spectrum (identified by system=multispec in the header) there
	is a bug such that if there are more than 8 spectra the message:

	Warning: MWCS: too many coordinate transformation (ctran) descriptors
	ERROR: segmentation violation

	appears.  Most commonly this will affect echelle data.  The
	workaround is to apply DOPCOR with the aperture parameter
	in groups of 8 or less spectra.  For example:

	    cl> dopcor obj.ec obj1.ec -120 isvel+ add- ap=1-8
	    cl> dopcor obj1.ec obj1.ec -120 isvel+ add- ap=9-16
	    ...

	Note the second and subsequent steps work in place.

STATUS:	This bug, which is a typo in the code, is fixed for a release after
	V2.10.3BETA (possibly the Solaris patch) and V2.11.

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