```
nag_opt_handle_solve_dfls (e04ffc) Example Program Results

---------------------------------------------------
E04F(G|F)), Derivative free solver for data fitting
(nonlinear least-squares problems)
---------------------------------------------------

Problem statistics
Number of variables                  4
Number of unconstrained variables    2
Number of fixed variables            0
Starting interpolation points        5
Total interpolation points           5
Number of residuals                 11

Begin of Options
Print File                    =                   6     * d
Print Level                   =                   2     * d
Print Options                 =                 Yes     * d
Print Solution                =                   X     * U
Monitoring File               =                  -1     * d
Monitoring Level              =                   4     * d
Dfo Print Frequency           =                   1     * d
Dfo Monitor Frequency         =                   0     * d

Infinite Bound Size           =         1.00000E+20     * d
Stats Time                    =                  No     * d
Time Limit                    =         1.00000E+06     * d

Dfo Initial Interp Points     =          Coordinate     * d
Dfo Max Objective Calls       =                 500     * d
Dfo Max Soft Restarts         =                   5     * d
Dfo Max Unsucc Soft Restarts  =                   3     * d
Dfo Maximum Slow Steps        =                  20     * d
Dfo Noise Level               =         0.00000E+00     * d
Dfo Noisy Problem             =                  No     * d
Dfo Number Initial Points     =                   0     * d
Dfo Number Interp Points      =                   0     * d
Dfo Number Soft Restarts Pts  =                   3     * d
Dfo Random Seed               =                  -1     * d
Dfo Starting Trust Region     =         1.00000E-01     * d
Dfo Trust Region Slow Tol     =         1.02648E-04     * d
Dfo Trust Region Tolerance    =         5.00000E-06     * U
Dfo Version                   =              Latest     * d
Dfls Small Residuals Tol      =         1.08158E-12     * d
End of Options
----------------------------------------
step |    obj        rho    |    nf   |
----------------------------------------
1 |  1.72E-03  1.00E-01  |     6   |
2 |  6.41E-04  1.00E-01  |     7   |
3 |  4.52E-04  1.00E-01  |     8   |
4 |  4.05E-04  1.00E-02  |     9   |
5 |  4.04E-04  1.00E-02  |    10   |
6 |  4.03E-04  1.00E-02  |    14   |
7 |  4.02E-04  1.00E-02  |    15   |
8 |  4.02E-04  1.00E-03  |    20   |
9 |  4.02E-04  7.07E-05  |    21   |
10 |  4.02E-04  7.07E-05  |    23   | s
----------------------------------------
Status: Converged, small trust region size

Value of the objective                    4.02423E-04
Number of objective function evaluations           27
Number of steps                                    10

Primal variables:
idx   Lower bound        Value      Upper bound
1       -inf       1.81300E-01         inf
2   2.00000E-01    5.90128E-01    1.00000E+00
3       -inf       2.56929E-01         inf
4   3.00000E-01    3.00000E-01         inf
```