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PRESOLVE

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Description	This control determines whether presolving should be performed prior to starting the main algorithm. Presolve attempts to simplify the problem by detecting and removing redundant constraints, tightening variable bounds, etc. In some cases, infeasibility may even be determined at this stage, or the optimal solution found.
Type	Integer
Values	-1  Presolve applied, but a problem will not be declared infeasible if primal infeasibilities are detected. The problem will be solved by the LP optimization algorithm, returning an infeasible solution, which can sometimes be helpful. 0  Presolve not applied. 1  Presolve applied. 2  Presolve applied, but redundant bounds are not removed. This can sometimes increase the efficiency of the barrier algorithm.
Default value	1
Notes	Memory for presolve is dynamically resized. If the Optimizer runs out of memory for presolve, an error message (245) is produced.
Affects routines	XPRSmaxim (MAXIM), XPRSminim (MINIM).
See also	Working with Presolve, PRESOLVEOPS.

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