#9617: Broken export of LP files....
-------------------------+--------------------------------------------------
Reporter: ncohen | Owner: jason, jkantor
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.5.2
Component: numerical | Keywords: CPLEX, GLPK, glpsol, MPS, file
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
-------------------------+--------------------------------------------------
Comment(by ncohen):
Hello !!!
By carefully looking at the two logs, the one you just gave and the one
given by John on #9584, I noticed a difference, even though all the number
of entries, lines/etc were the same. Yours
{{{
+ 1589: mip = not found yet >= -inf (1; 0)
}}}
His
{{{
+ 1589: mip = not found yet <= +inf (1; 0)
}}}
And all the following inequalities are reversed... Well, it sounds like
you are working on a minimization problem, while John his working on a
maximization problem. That's when I remembered a problem I had had with
GLPK a long time ago when using it through the command-line (but perhaps
it was CPLEX or CBC, I do not remember). At least one of them was
completely ignoring the direction of the optimization given in the file,
and only behaved nicely when given the good flag... Could you give it a
try with one of those ?
{{{
--min minimization
--max maximization
}}}
I am really sorry but I can not do it myself, I am travelling these days
and unable to find any place where I could use my own computer ^^;
Nathann
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9617#comment:7>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
