[Symphony] SYMPHONY 5.5.7 ..

[Ted Ralphs]

This does sound like a bug in the pre-processor. The pre-processor is a
relatively new addition to SYMPHONY. Can you share an instance file that
demonstrates this off-line?

Cheers,

Ted


On Tue, May 20, 2014 at 9:19 AM, Mikko Alinikula - SUBNIC OY <
subnic at kolumbus.fi> wrote:

> Hello Ted,
>
> I calculate the my truss-problem in 2 phases.  First a
> fixed-geometry-solution is optimized with SYMPHONY and it takes around 100
> ms to get a solution.  In phase 2 I input that solution as a initial
> solution using sym_set_col_solution-function to calculate the real problem.
>
> I got this working with small models but larger models with 1000 variables
> or so crashed when I called sym_solve.  Sometimes a memory error was issued
> but more often the system just crashed.
>
> But there seems to be a workaround to this .. if I set
> sym_set_int_param(env, "prep_level", 0) I got the system working with
> models having more than 3000 variables and 10000 restricting equations.
>
> Maybe there is a bug in the preprosessor in the Win32-environment?
>
> BR
>
> Mikko
>
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-- 
Dr. Ted Ralphs
Associate Professor, Lehigh University
(610) 628-1280
ted 'at' lehigh 'dot' edu
coral.ie.lehigh.edu/~ted
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