| DEF ARG | Define Temporary ARG Value | 
DEF ARG(nnn)="value"
| nnn | Argument number to be changed. | 
| value | New value to be returned for the specified ARG. | 
The DEF ARG directive can be used to change the values returned by the ARG function. This directive allows you to temporarily override the value normally found following the -ARG parameter on the Command line that launched the system.
(The DEF ARG(nnn) function was added in PxPlus v6.30.)