option cplex_options 'mipdisplay 2 mipinterval 100 ...';
where ... is replaced by the other options that you are using (or is omitted
if none). You can change 100 to some other value to regulate the amount of
output.
> -----Original Message-----
> From:
ampl@... [mailto:
ampl@...]
> On Behalf Of Guney Petek [
guneyp@...]
> Sent: Sunday, June 14, 2009 2:13 PM
> To: AMPL Modeling Language
> Subject: [AMPL 2595] cplex troubleshooting
>
>
> Greetings,
>
> My model works for a number of instances except for a large instance(~
> 400000 vars and 200000 cons) on which I am getting this error:
> ---
> Presolve eliminates 34074 constraints and 34074 variables.
> ...
>
> Error at _cmdno 71 executing "solve" command
> (file model.run, line 62, offset 1585):
> can't open model.sol
> ---
>
> I suspect that cplex is dying at some point. In order to trace the
> problem I'd like to get more information from cplex along its
> progress. What options can I use for troubleshooting cplex?
>
> Thank you, \\Guney
>
>
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