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Buglog #145

  • Wednesday, March 27 1991 @ 11:57 PM GMT
  • Contributed by:
  • Views: 978
MODULE: apextract
SYSTEM: V2.9
NUMBER:	145
MODULE:	apextract
SYSTEM:	V2.9
DATE:	Wed Mar 27 16:57:13 MST 1991
FROM:	valdes

BUG:	For some default background functions and sample regions a singular
	solution error can occur.  This is caused by defining the function
	range to be the entire image dimension while the sample region is
	only a small part of this range.  It probably also depends on the
	function type and order and the degree of curvature in the fitted
	data.  When apertures are read from the database or reset by the
	'b' mode in APEDIT the fitting limits are set to the limits of the
	sample region.

STATUS:	The singular solution message should be harmless.  Reading apertures
	from a database does not have this problem.  Entering the 'b' mode in
	APEDIT (where the message might be seen) and exiting will fix the
	fitting function properly.  Of course if background subtraction
	is not required this problem does not arise.  The problem has
	been fixed for V2.10.

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