NAG FL Interface
e04zmf (handle_​opt_​set)

1 Purpose

2 Specification

3 Description

4 References

5 Arguments

1: $\mathbf{handle}$ – Type (c_ptr) Input

On entry: the handle to the problem. It needs to be initialized by e04raf and must not be changed.

2: $\mathbf{optstr}$ – Character(*) Input

On entry: a string identifying the option and its value to be set.

$\mathbf{Defaults}$

Resets all options to their default values.

$\mathit{Option}=\mathit{optval}$

See the documentation of the particular solver for details of valid values for option and optval. The equals sign ($=$) delimiter must be used to separate the option from its optval value.

$\mathit{Option}=\mathbf{Default}$

Resets the given option back to its default value.

optstr is case insensitive. Each token in the option and optval component must be separated by at least one space.

3: $\mathbf{ifail}$ – Integer Input/Output

On entry: ifail must be set to $0$, $-1\text{ or }1$. If you are unfamiliar with this argument you should refer to Section 4 in the Introduction to the NAG Library FL Interface for details.

For environments where it might be inappropriate to halt program execution when an error is detected, the value $-1\text{ or }1$ is recommended. If the output of error messages is undesirable, then the value $1$ is recommended. Otherwise, if you are not familiar with this argument, the recommended value is $0$. When the value $-\mathbf{1}\text{ or }\mathbf{1}$ is used it is essential to test the value of ifail on exit.

On exit: $\mathbf{ifail}=\mathbf{0}$ unless the routine detects an error or a warning has been flagged (see Section 6).

6 Error Indicators and Warnings

$\mathbf{ifail}=1$

The supplied handle does not define a valid handle to the data structure for the NAG optimization modelling suite. It has not been initialized by e04raf or it has been corrupted.

$\mathbf{ifail}=2$

The options cannot be modified in this phase.

$\mathbf{ifail}=11$

On entry, the option supplied in optstr was not recognized: $\mathbf{optstr}=〈\mathit{\text{value}}〉$.

$\mathbf{ifail}=12$

On entry, the expected delimiter ‘$=$’ was not found in optstr: $\mathbf{optstr}=〈\mathit{\text{value}}〉$.

$\mathbf{ifail}=13$

On entry, could not convert the specified optval to an integer: $\mathit{optval}=〈\mathit{\text{value}}〉$.

On entry, could not convert the specified optval to a real: $\mathit{optval}=〈\mathit{\text{value}}〉$.

$\mathbf{ifail}=15$

On entry, the optval supplied for the integer optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.
Constraint: $\mathit{optval}<〈\mathit{\text{value}}〉$.

On entry, the optval supplied for the integer optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.
Constraint: $\mathit{optval}>〈\mathit{\text{value}}〉$.

On entry, the optval supplied for the integer optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.
Constraint: $\mathit{optval}\le 〈\mathit{\text{value}}〉$.

On entry, the optval supplied for the integer optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.
Constraint: $\mathit{optval}\ge 〈\mathit{\text{value}}〉$.

$\mathbf{ifail}=16$

On entry, the optval supplied for the real optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.
Constraint: $\mathit{optval}<〈\mathit{\text{value}}〉$.

On entry, the optval supplied for the real optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.
Constraint: $\mathit{optval}>〈\mathit{\text{value}}〉$.

On entry, the optval supplied for the real optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.
Constraint: $\mathit{optval}\le 〈\mathit{\text{value}}〉$.

On entry, the optval supplied for the real optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.
Constraint: $\mathit{optval}\ge 〈\mathit{\text{value}}〉$.

$\mathbf{ifail}=17$

On entry, the optval supplied for the character optional parameter is not valid.
$\mathit{option}=〈\mathit{\text{value}}〉$, $\mathit{optval}=〈\mathit{\text{value}}〉$.

$\mathbf{ifail}=-99$

An unexpected error has been triggered by this routine. Please contact NAG.

See Section 7 in the Introduction to the NAG Library FL Interface for further information.

$\mathbf{ifail}=-399$

Your licence key may have expired or may not have been installed correctly.

See Section 8 in the Introduction to the NAG Library FL Interface for further information.

$\mathbf{ifail}=-999$

Dynamic memory allocation failed.

See Section 9 in the Introduction to the NAG Library FL Interface for further information.

7 Accuracy

8 Parallelism and Performance

9 Further Comments

10 Example