Submit a Story  :  IRAF Links  :  Past Polls  :  Calendar  :  Advanced Search  
     iraf.net
  About iraf.net
Downloads
Docs
Projects
FAQ
Support
Forums
Links
Email Contact Us  
Privacy Policy
User Functions
Username:

Password:

Don't have an account yet? Sign up as a New User
What's New
STORIES
No new stories

COMMENTS last 48 hrs
No new comments
 Forum FAQForum FAQ   Forum SearchForum Search   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Segmentation violation with some data

 
Post new topic   Reply to topic    iraf.net Forum Index -> General IRAF
View previous topic :: View next topic  
Author Message
iz



Joined: 22 Jul 2009
Posts: 6
PostPosted: Wed Jun 22, 2011 2:55 pm    Post subject: Segmentation violation with some data Reply with quote
Hi,

I'm using IRAF 2.15.1a on a 64bit Mac and experience the following problem with a FITS file from the UKIDSS survey (available at http://nice.sai.msu.ru/~iz/ukidss_iraf.fits) which is supposed to be OK:

Code:

tv> display ukidss_iraf.fits[1] 1
   ----- task cl - line 0 ( ) -----
       0      41+4:   call      display
       0      45+9:   pushconst   `ukidss_iraf.fits[1]'
       0      54+4:   posargset   0
       0      58+5:   pushconst   1
       0      63+4:   posargset   1
       0      67+3:   exec
   ----- exec external task display - line 0 -----
   ----- connect to bin$x_tv.e -----
       display\nimage="ukidss_iraf.fits[1]"\nframe=1\n
       bpmask="BPM"\nbpdisplay="none"\nbpcolors="red"\noverlay=""\n
       ocolors="green"\nerase=yes\nborder_erase=no\n
       select_frame=yes\nrepeat=no\nfill=no\nzscale=yes\n
       contrast=0.25\nzrange=yes\nzmask=""\nnsample=1000\n
       xcenter=0.5\nycenter=0.5\nxsize=1.\nysize=1.\nxmag=1.\n
       ymag=1.\norder=0\nztrans="linear"\nlutfile=""\nmode="ql"\n
       $nargs=2\n
   --------------------------------
   ----- task display - line 15 ( ) -----
      15      73+4:   call      error
1: CALL error
      15      77+5:   pushconst   501
      15      82+4:   posargset   0
      15      86+8:   pushconst   `segmentation violation'
      15      94+4:   posargset   1
      15      98+3:   exec
   ----- exec builtin error : line 15 -----
   ----- disconnect bin$x_tv.e -----
ERROR: segmentation violation
cl_error: abort=1  beep=1  trace=1  flpr=1
cl_error: code=501 do_err=1 errtype=1/1 task='cl'


Other routines fail with these data as well:

Code:

tv> blkavg ukidss_iraf.fits[1] ukidss_iraf_binned.fits 2 2
   ----- task cl - line 0 ( ) -----
       0      41+4:   call      blkavg
       0      45+9:   pushconst   `ukidss_iraf.fits[1]'
       0      54+4:   posargset   0
       0      58+9:   pushconst   `ukidss_iraf_binned.fits'
       0      67+4:   indirposset   1
       0      71+5:   pushconst   2
       0      76+4:   posargset   2
       0      80+5:   pushconst   2
       0      85+4:   posargset   3
       0      89+3:   exec
   ----- exec external task blkavg - line 0 -----
   ----- connect to bin$x_images.e -----
       blkavg\ninput="ukidss_iraf.fits[1]"\n
       output="ukidss_iraf_binned.fits"\noption="average"\n
       b1=2\nb2=2\nmode="ql"\n$nargs=4\n
   --------------------------------
   ----- task blkavg - line 17 ( ) -----
      17      95+4:   call      error
1: CALL error
      17      99+5:   pushconst   501
      17     104+4:   posargset   0
      17     108+8:   pushconst   `segmentation violation'
      17     116+4:   posargset   1
      17     120+3:   exec
   ----- exec builtin error : line 17 -----
   ----- disconnect bin$x_images.e -----
ERROR: segmentation violation
cl_error: abort=1  beep=1  trace=1  flpr=1
cl_error: code=501 do_err=1 errtype=1/1 task='cl'


Can you please explain what's wrong here? Have no problems accessing this FITS data oustide of IRAF.

--
With best regards,
Ivan
Back to top
View user's profile Send private message
fitz
Site Admin


Joined: 30 Sep 2005
Posts: 3255
Location: Tucson
PostPosted: Wed Jun 22, 2011 7:22 pm    Post subject: Reply with quote
I can reproduce the problem, which appears to be an alignment issue on 64-bit systems for certain types of data. I'll have to investigate further and the fix will require a new set of binaries for the entire system (or at least a new library and a relink of the system).

I also found that you can workaround the problem using 32-bit binaries for the platform (e.g. the 'macosx' architecture on Mac systems), or for this image copying out the one extension to a simple FITS file (on a 32-bit system) would also work. If you installed both sets of binaries for Mac, you can define the IRAFARCH environment variable in your .cshrc file to force the use of the 'macosx' architecture, otherwise you can download and install these binaries separately.

Last edited by fitz on Thu Jun 23, 2011 3:48 pm; edited 1 time in total
Back to top
View user's profile Send private message
iz



Joined: 22 Jul 2009
Posts: 6
PostPosted: Thu Jun 23, 2011 3:12 pm    Post subject: Reply with quote
Indeed, 32-bit binaries work. I switched to them for this time, thanks for suggesting this workaround.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    iraf.net Forum Index -> General IRAF All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2009 phpBB Group
 Copyright © 2005-2011 iraf.net
 All trademarks and copyrights on this page are owned by their respective owners.		 Powered By Geeklog 
Created this page in 0.60 seconds