e05jkf is used to get the value of an integer e05jbf optional parameter. e05jkf can be used before or after calling e05jbf, but the initialization routine e05jafmust have been called before calling e05jkf.
The default values of the optional parameters Function Evaluations Limit, Splits Limit and Static Limit depend on the problem parameter (the number of non-fixed variables). A default value for each of these optional parameters will be set in the first call to the solver e05jbf: before that time, getting the value of any of these optional parameters using e05jkf will not return a meaningful result.
A complete list of optional parameters, their symbolic names and default values is given in Section 12 in e05jbf.
1: – Character(*)Input
On entry: a string identifying an integer-valued optional parameter (as described in Section 12 in e05jbf).
2: – IntegerOutput
On exit: if on exit, ivalue contains the integer value associated with the optional parameter in optstr.
3: – Real (Kind=nag_wp) arrayCommunication Array
On entry: communication data as initialized by e05jaf.
4: – IntegerInput
On entry: the dimension of the array comm as declared in the (sub)program from which e05jkf is called.
5: – IntegerInput/Output
On entry: ifail must be set to , or to set behaviour on detection of an error; these values have no effect when no error is detected.
A value of causes the printing of an error message and program execution will be halted; otherwise program execution continues. A value of means that an error message is printed while a value of means that it is not.
If halting is not appropriate, the value or is recommended. If message printing is undesirable, then the value is recommended. Otherwise, the value is recommended. When the value or is used it is essential to test the value of ifail on exit.
On exit: unless the routine detects an error or a warning has been flagged (see Section 6).
6Error Indicators and Warnings
If on entry or , explanatory error messages are output on the current error message unit (as defined by x04aaf).
Errors or warnings detected by the routine:
Initialization routine e05jaf has not been called.
On entry, .
The supplied optional parameter is invalid. A keyword or keyword combination was not recognized.
An unexpected error has been triggered by this routine. Please
See Section 7 in the Introduction to the NAG Library FL Interface for further information.
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.
Dynamic memory allocation failed.
See Section 9 in the Introduction to the NAG Library FL Interface for further information.
8Parallelism and Performance
Background information to multithreading can be found in the Multithreading documentation.