Options | Solvers

Shows a matrix of available solvers and model types.

Three types of solver defaults can be displayed: the system defaults as determined by the GAMS installation files, the defaults managed by the IDE and the defaults for the current project.

The first column shows all available solvers. The second column shows the license status of the solver obtained from the GAMS license file (gamslice.txt). When a solver is enabled for a limited time period, this column will show the number of days remaining for evaluation.

Use the mouse to select an entry in the matrix to select a default solver for a given model type. A mouse click in the license column will make the selected solver the default solver for all applicable model types.

The matrix shows the available solvers for all types of GAMS models. A small rectangle indicates that the solver is the default solver for the model type; a dot indicates a possible selection, and the dash indicates a possible selection for a special solver. Special solvers are only shown for information, they cannot be selected from the matrix. To select a special solver, you will have to specify the solver using additional parameters (see GAMS Parameters) or with an option statement in the GAMS model. The 'Legend' button will show the meaning of the symbols used; a mouse-click will make the legend disappear again.

The 'Reset' button above the matrix will remove all default assignments. When the button is disabled, this is an indication that the system defaults cannot be modified. (This can happen in a network environment when you do not have write permission for the GAMS system directory.)

The solver selection is processed in the following order:

         System defaults

         Local defaults

         Project defaults

The last solver specified will be used.

Note that the GAMS option statement can overwrite your default selections also.