Initializing help system before first use

XSLPsetfunctionerror

XSLPsetfunctionerror

Purpose
Set the function error flag for the problem
Synopsis
int XPRS_CC XSLPsetfunctionerror(XSLPprob Prob);
Argument
Prob 
The current SLP problem.
Example
The following example from within a user function sets the function error flag if there is an error during the function evaluation: 
double XPRS_CC ProfitCalc(double *Value, int *ArgInfo) {
  XSLPprob Prob;
  double Factor, Size;
  Factor = Value[0];
  Size = Value[1];
  if (Factor < 0) {
    XSLPgetfuncobject(ArgInfo, XSLP_XSLPPROBLEM, &Prob);
    XSLPsetfunctionerror(Prob);
    return 0.0;
  }
  return pow(Factor,Size);
}
Note the use of XSLPgetfuncobject to retrieve the Xpress NonLinear problem.
Further information
Once the function error has been set, calculations generally stop and the routines will return to their caller with a nonzero return code.

Parent Topic Library functions

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