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Buglog #284

  • Wednesday, March 22 1995 @ 02:56 PM GMT
  • Contributed by:
  • Views: 924
MODULE: photcal.mknobsfile,photcal.mkobsfile
SYSTEM: V2.10
NUMBER:	284
MODULE:	photcal.mknobsfile,photcal.mkobsfile
SYSTEM:	V2.10
DATE:	Wed Mar 22 07:56:37 MST 1995
FROM:	davis

BUG:	A very serious problem has been found in the iraf 2.10.3 and digiphotx
	mknobsfile/mkobsfile scripts.  Running mknobsfile/mkobsfile on files
	written by the allstar/nstar tasks (but not the phot task) may corrupt
	the input files. This is definitely not problem for
	mknobsfile/mkobsfile in 2.10.2 and earlier version of iraf or for
	digiphotx linked with versions 1.2.1 and earlier of the tables package.

	The problem crept in when the tables package was modified to support
	text tables.  The error check in mknobsfile/mkobsfile previously
	used to detect whether an input file was a text file or binary
	table began to fail for allstar/nstar files. The code thought the
	text file was a binary table, opened it as such, and attempted to
	edit it. Although the code was smart enough to detect that the
	proper columns etc were not present and did not do any actual editing,
	simply opening and closing the file as a table in READ_WRITE mode
	caused to file to be rewritten and its format corrupted.

STATUS:	This problem has been fixed for the next release of iraf and in the
	forth-coming 2.10.3 patch as well as in the ftp archive version of
	digiphotx. If you are running later versions of tables there is no
	workaround except installing the patch and/or the new version of
	digiphotx. We have confirmed that there is a problem running
	mknobsfile/mkobsfile with tables 1.3.2 and 1.3.3 and that there
	was definitely not a problem with tables 1.2.1 and earlier but are
	not certain of the status of intermediate versions.


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