iraf.net

NUMBER:	454
MODULE:	proto.fixpix, ccdproc
SYSTEM:	V2.11-V2.11.3
DATE:	Wed Dec 15 14:30:44 MST 1999
FROM:	valdes

BUG:	Tasks which allow a text file description of bad pixels in addition
	to a bad pixel mask, which include fixpix and ccdproc, will fail
	with a 757 error when a large number of files are processed.  This
	might occur with a large @file or in many repeated calls without
	an intervening flushing of the process cache such as with flpr.
	This problem is caused by a system error that fails to free a file
	descriptor.  After a sufficient number of executions the number of
	available free file descriptors is depleted and the 757 error (too
	many open files ) is reported.  The workarounds are to either use
	bad pixel masks or to limit the number of images in each execution
	and to use flpr after a 50 or so images are processed.

STATUS:	A system fix is under investigation for the next release.