NAG Library Routine Document

e05jef  (bnd_mcs_optset_char)

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Purpose

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Specification

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Description

lcsrch = 'off'
Call e05jef ('Local Searches', lcsrch, comm, lcomm, ifail)

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References

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Arguments

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

On entry: a string defining a single ‘ON’/‘OFF’-valued character optional parameter (as described in Section 12 in e05jbf).

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

On entry: the ‘ON’/‘OFF’ value associated with the keyword in optstr.

3:     $\mathbf{comm}\left(\mathbf{lcomm}\right)$ – Real (Kind=nag_wp) arrayCommunication Array

On exit: comm must not be altered between calls to any of the routines e05jbf, e05jcf, e05jdf, e05jef, e05jff, e05jgf, e05jhf, e05jjf, e05jkf and e05jlf.

4:     $\mathbf{lcomm}$ – IntegerInput

On entry: the dimension of the array comm as declared in the (sub)program from which e05jef is called.

Constraint: $\mathbf{lcomm}\ge 100$.

5:     $\mathbf{ifail}$ – IntegerInput/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 3.4 in How to Use the NAG Library and its Documentation 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).

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Error Indicators and Warnings

$\mathbf{ifail}=1$

Initialization routine e05jaf has not been called.

On entry, $\mathbf{lcomm}=〈\mathit{\text{value}}〉$.
Constraint: $\mathbf{lcomm}\ge 100$.

$\mathbf{ifail}=2$

The supplied optional parameter is invalid. A keyword or keyword combination was not recognized.

$\mathbf{ifail}=3$

Attempt to assign an illegal value of Local Searches ($\mathit{lcsrch}$): $\mathit{lcsrch}=〈\mathit{\text{value}}〉$.

Attempt to assign an illegal value of Repeatability ($\mathit{repeat}$): $\mathit{repeat}=〈\mathit{\text{value}}〉$.

$\mathbf{ifail}=-99$

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

See Section 3.9 in How to Use the NAG Library and its Documentation for further information.

$\mathbf{ifail}=-399$

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

See Section 3.8 in How to Use the NAG Library and its Documentation for further information.

$\mathbf{ifail}=-999$

Dynamic memory allocation failed.

See Section 3.7 in How to Use the NAG Library and its Documentation for further information.

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Accuracy

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Parallelism and Performance

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Further Comments

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Example