# NAG FL Interfacee04wcf (nlp2_​init)

## ▸▿ Contents

Settings help

FL Name Style:

FL Specification Language:

## 1Purpose

e04wcf is used to initialize the routine e04wdf.

## 2Specification

Fortran Interface
 Subroutine e04wcf ( iw, rw,
 Integer, Intent (In) :: leniw, lenrw Integer, Intent (Inout) :: ifail Integer, Intent (Out) :: iw(leniw) Real (Kind=nag_wp), Intent (Out) :: rw(lenrw)
#include <nag.h>
 void e04wcf_ (Integer iw[], const Integer *leniw, double rw[], const Integer *lenrw, Integer *ifail)
The routine may be called by the names e04wcf or nagf_opt_nlp2_init.

## 3Description

e04wcf initializes the arrays iw and rw for the routine e04wdf.

None.

## 5Arguments

1: $\mathbf{iw}\left({\mathbf{leniw}}\right)$Integer array Communication Array
2: $\mathbf{leniw}$Integer Input
On entry: the dimension of the array iw as declared in the (sub)program from which e04wcf is called.
Constraint: ${\mathbf{leniw}}\ge 600$, see routine e04wdf.
3: $\mathbf{rw}\left({\mathbf{lenrw}}\right)$Real (Kind=nag_wp) array Communication Array
4: $\mathbf{lenrw}$Integer Input
On entry: the dimension of the array rw as declared in the (sub)program from which e04wcf is called.
Constraint: ${\mathbf{lenrw}}\ge 600$, see routine e04wdf.
5: $\mathbf{ifail}$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 $-\mathbf{1}$ 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).

## 6Error Indicators and Warnings

If on entry ${\mathbf{ifail}}=0$ or $-1$, explanatory error messages are output on the current error message unit (as defined by x04aaf).
Errors or warnings detected by the routine:
${\mathbf{ifail}}=1$
On entry, ${\mathbf{leniw}}=⟨\mathit{\text{value}}⟩$.
Constraint: ${\mathbf{leniw}}\ge 600$.
On entry, ${\mathbf{lenrw}}=⟨\mathit{\text{value}}⟩$.
Constraint: ${\mathbf{lenrw}}\ge 600$.
${\mathbf{ifail}}=-99$
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.

Not applicable.