---Reply to mail from Afonso Celso Medina about Solver with Constraints failure
> Hi!
>
> When I changed my 1.4.2 gnumeric (linux) to the 1.5.2 version(win32), I
> have noticed that the Solver tool didn't work never more. Using the
> Program report, I could discover that it is not a problem in Target
> Cell, but there is a problem in Constraints parsing. Now, all my
> correct old models runs to Unbounded Solution.
>
Hi, Afonso,
could You please, supply a small representative example,
of LP program, where your problem is demonstrated?
I can confirm, that in following problem:
-------------------------------------------
Maximize:
x1 + x2
Subject to:
2 x1+ x2 <= 2
x1 + 2 x2 <= 2
(x1, x2 >=0)
-------------------------------------------
the constraints are parsed incorrectly as:
-x1 + x2 <= 0
-2 x1 +2 x2 <= 0
Solver seems to be broken in 1.5.2.
I suggested patches for working with
affine expressions of type c0 + sum(i=1..n, c_i * x_i),
they worked in 1.4.3; hope someone of Gnumeric developers
could quickly identify the cause of solver failures in 1.5 series,
altough I am not sure the problem is connected
with my suggestions.
I will try to compile myself the sources of 1.5.2 and see,
if I can do something with the mentioned problem.
Mike
------------------------------------------------------------------------
Michal Kaukic ([EMAIL PROTECTED])
Dept. of Math. Methods, Fac. of Manag. & Informatics
University of Zilina, Slovak Republic
_______________________________________________
gnumeric-list mailing list
[email protected]
http://mail.gnome.org/mailman/listinfo/gnumeric-list
