e04wk: FL CL CPP AD PY MB

NAG FL Interface
e04wkf (nlp2_option_integer_get)

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Interfaces: FL CL CPP AD PY MB

e04wk: FL CL CPP AD PY MB

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e04wkf is used to get the value of an integer optional parameter. e04wkf can be used before or after calling e04wdf.

Fortran Interface

Subroutine e04wkf (

C Header Interface

#include <nag.h>

void	e04wkf_ (const char st, Integer ivalue, Integer iw[], double rw[], Integer *ifail, const Charlen length_st)

The routine may be called by the names e04wkf or nagf_opt_nlp2_option_integer_get.

e04wkf obtains the current value of an integer option. For example

Call e04wkf ('Iterations', itnlim, iw, rw, ifail)

will result in the value of the optional parameter Major Iterations Limit being output in ITNLIM.

A complete list of optional parameters, their abbreviations, synonyms and default values is given in Section 12 in e04wdf.

None.

1: $string$ – Character(*) Input: On entry: a single valid keyword of an integer optional parameter (as described in Section 12 in e04wdf).
2: $ivalue$ – Integer Output: On exit: the integer value associated with the keyword in string.
3: $iw (*)$ – Integer array Communication Array: Note: the actual argument supplied must be the array iw supplied to the initialization routine e04wcf.
4: $rw (*)$ – Real (Kind=nag_wp) array Communication Array: Note: the actual argument supplied must be the array rw supplied to the initialization routine e04wcf.
5: $ifail$ – Integer Input/Output: On entry: ifail must be set to $0$ , $−1$ or $1$ to set behaviour on detection of an error; these values have no effect when no error is detected.
A value of $0$ causes the printing of an error message and program execution will be halted; otherwise program execution continues. A value of $−1$ means that an error message is printed while a value of $1$ means that it is not.

If halting is not appropriate, the value $−1$ or $1$ is recommended. If message printing is undesirable, then the value $1$ is recommended. Otherwise, the value $0$ is recommended. When the value $- 1$ or $1$ is used it is essential to test the value of ifail on exit.

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

If on entry

ifail = 0

−1

, explanatory error messages are output on the current error message unit (as defined by x04aaf).

Errors or warnings detected by the routine:

$ifail = 2$: The supplied option string is invalid. Check that the keywords are neither ambiguous nor misspelt. The option string is ‘ $⟨ value ⟩$ ’.

$ifail = - 99$: 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.

$ifail = - 399$: 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.