[Coin-discuss] AIX Ampl->nl->Linux->cbc->sol->AIX Ampl not working

[Kendall Bailey]

I have done almost exactly what you are describing.  I'm currently
using CPLEX as the solver on Linux ( AMD Opteron hardware ).  However,
I have done the same thing with an AMPL solver I wrote which utilizes
the Osi interfaces, and thus Cbc, Clp, Symphony, glpk, ... to do the
actual solve step.  I've had no endian troubles at all.  I'm using
AMPL on AIX just as you are.  Sorry I can't help with the Cbc program
itself.  I've planned to release the solver driver I wrote for some
time, but priorities changed.  I can send it to you if you'd like to
see it.

Kendall


On 9/22/06, Derek Jones <scunacc at yahoo.com> wrote:
> Dear folks,
>
> What I'm trying to achieve may be a non-started because of endian /
> alignment issues, but I'm not sure.
>
> I want to do this:
>
> Have AMPL generate a .nl file, call a wrapper program instead of the
> solver, send the .nl file via the wrapper to Linux, where I will solve
> the problem using cbc file.nl -AMPL, then get the .sol file back on AIX.
>
> I have problems.
>
> Linux can't seem to write the .sol file properly. It *appears* to solve
> OK, but then bombs in the writesol.c file in getsufhead.
>
> I've traced thru, and there appears to be unreadable pointer memory
> inside the current "d" variable.
>
> Anyhow, has anyone got the ampl solver stuff to work OK on Linux? If so,
> what compile options did you use?
>
> Has anyone faced the above problem?
>
> Has anyone else :-) tried anything as crazy as the subject line at all ?
>
> Kind regards
>
> Derek Jones.
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