bugGNU Octave - Bugs: bug #30460, call to GLPK hangs

 
 

bug #30460: call to GLPK hangs

Submitted by:  None
Submitted on:  Fri 16 Jul 2010 10:00:11 AM UTC  
 
Category: LibrariesSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Segfault, Bus Error, etc.
Status: Works For MeAssigned to: None
Originator Name: Mahesh SivasambuOriginator Email: -unavailable-
Open/Closed: ClosedRelease: 3.2.3
Operating System: Mac OS

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Mon 16 Aug 2010 04:01:54 AM UTC, comment #3:

As suggested, I compiled octave 3.2.4 from source with the latest glpk-4.44. A call to GLPK hangs no more.
Thanks!
Mahesh

Anonymous
Mon 16 Aug 2010 01:22:10 AM UTC, comment #2:

No activity in 1 month. Closing issue.

Rik <rik5>
Project Administrator
Fri 16 Jul 2010 06:59:11 PM UTC, comment #1:

I am unable to confirm this bug with version 3.2.3, 3.2.4, or the development version 3.3.51. However, I am running on a GNU/Linux system rather than a Mac.

I suspect the problem is with the pre-compiled version for the Mac. I guess I would suggest trying to build the 3.2.4 version from source. I should also say that I am using glpk version 4.38. If you can upgrade to that version it might help.

Rik <rik5>
Project Administrator
Fri 16 Jul 2010 10:00:11 AM UTC, original submission:

The following sequence of calls to glpk to solve a small (8x48) linear programming problem hangs:

epun:/tmp> octave
octave-3.2.3:1> global A b c
octave-3.2.3:2> load "Abc.out"; # file Abc.out is attached.
octave-3.2.3:3> [y, fmin, status, extra] = glpk( c, A, b )
(no output)

I am using GNU Octave, version 3.2.3, (binary file downloaded from octave.sourceforge.net)

The present bug is very sensitive to the matrices A, b and c's values. If I were to store the variables in ascii format (instead of binary) the bug vanishes. I am guessing this is because of truncation.

This may be a GLPK bug and not an octave bug after all. If so, how can I tell?

Many thanks,
Mahesh

Anonymous

 

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Attach File(s):
   
   
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Attached Files
file #20991:  Abc.out added by None (4KiB - application/octet-stream)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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  • -unavailable- added by rik5 (Posted a comment)
  • -unavailable- added by None (Submitted the item)
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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Mon 16 Aug 2010 01:22:10 AM UTCrik5Open/ClosedOpen=>Closed
    Fri 16 Jul 2010 06:59:11 PM UTCrik5StatusNone=>Works For Me
    Fri 16 Jul 2010 10:00:12 AM UTCNoneAttached File-=>Added Abc.out, #20991

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