NUMERICS_MAX_ERROR

#define NUMERICS_MAX_ERROR 5.0e-9;

Maximum absolute error allowed for iterative methods. Iterative methods will continue until either the estimated absolute error is less than NUMERICS_MAX_ERROR or the number of iterations exceeds NUMERICS_ITMAX. In the later case, a NUMERICS_ERROR is raised.

Header:
#include "numerics.h"

See also:
NUMERICS_ITMAX