NAG Library Manual, Mark 30.3
Interfaces:  FL   CL   CPP   AD 
NAG FL Interface Introduction
Example description

 Implementation max active levels default: 2147483647
    No. threads in 1st parallel region:             3
    No. threads in 2nd parallel region:             1
    Total threads:                                  3


    Max active levels set to:                       2
    x06ak return value:                             2
    No. threads in 1st parallel region:             3
    No. threads in 2nd parallel region:             7
    Total threads:                                 21


    Max active levels set to:                       1
    x06ak return value:                             1
    No. threads in 1st parallel region:             3
    No. threads in 2nd parallel region:             1
    Total threads:                                  3