Perform a nonlinear presolve on the problem

The following example reads a problem from file, sets the presolve control, presolves the problem and then maximizes it.

XSLPreadprob(Prob, "Matrix", "");
XSLPsetintcontrol(Prob, XSLP_PRESOLVE, 1);
XSLPpresolve(Prob);
XSLPmaximize(Prob,"");

If bit 1 of XSLP_PRESOLVE is not set, no nonlinear presolve will be performed. Otherwise, the presolve will be performed in accordance with the bit settings.. XSLPpresolve is called automatically by XSLPconstruct, so there is no need to call it explicitly unless there is a requirement to interrupt the process between presolve and optimization. XSLPpresolve must be called before XSLPconstruct or any of the SLP optimization procedures.

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XSLP_PRESOLVE