iraf.net

NUMBER:	293
MODULE:	register, geotran
SYSTEM:	V2.10
DATE:	Fri Jun  9 16:43:56 MST 1995
FROM:	davis

BUG:	If the xsample or ysample parameters are greater than 1 and
	the nxblock or nyblock parameters are smaller than the image
	dimensions, register/geotran may fail with a memory corruption
	error.

	The error was due to a buffering error in the y coordinate
	interpolation surface.

STATUS:	Fixed for the next release of iraf. The workaround is to set
	xsample and ysample back to 1, which makes coordinate evaluation
	slower for high order surfaces but does not make much difference
	for simple surfaces, or set nxblock and nyblock to be larger than
	the input image size.