Dakota Reference Manual: absolute_conv_tol

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absolute_conv_tol

Absolute convergence tolerance

## Specification

Alias: none

Argument(s): REAL

Default: -1. (use NL2SOL internal default)

## Description

`absolute_conv_tol` (NL2SOL's `afctol`) is the absolute function convergence tolerance (stop when half the sum of squares is less than `absolute_conv_tol`, which is mainly of interest on zero-residual test problems).

The internal default is a function of machine epsilon (as limited by `function_precision`). The default is selected with a value of -1.