Writing options during a model run

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Users may wish to construct the options file during a job to insure that the option file contents are always current.  This can be done using Put command as discussed in the Output via Put Commands chapter.  In that case, the file must be closed prior to the SOLVE statement using a PUTCLOSE.  The following example shows the creation and closing of an option file for the MINOS solver as implemented in frstpart.gms.

 

FILE  OPT   MINOS option file  / MINOS5.OPT /;

PUT OPT;

PUT 'BEGIN'/

    '  Iteration limit        500'/

    '  Major damping parameter 0.5'/

    '  Feasibility tolerance   1.0E-7'/

    '  Scale all variables'/

    'END';

PUTCLOSE OPT;

 

Learning about options: Solver manuals

Default settings for Optfile

Defining a central location for the option files: Optdir