[Symphony] SYMPHONY 5.5.7 ..

[Mikko Alinikula - SUBNIC OY]

Hello Ted,

Unfortunately I can not share an instance file as I'm not the owner of 
the material.

BR

Mikko


20.5.2014 16:55, Ted Ralphs kirjoitti:
> 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 <mailto: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 <http://coral.ie.lehigh.edu/%7Eted>

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