Invoking Automatic Printer Definition

The APD process is invoked whenever:

An attempt to create a file for a destination not defined to CA Spool is encountered
In effect, an "attempt to create a file" is made whenever your application or a CA Spool internal component issues an ESFOPEN.
Files for destinations not defined in ESFPARM are found during a CA Spool WARM start.
Files for destinations not defined in ESFPARM are found during a CA Spool REINIT.
A member of an (E/)MAS configuration detects that a file for an unknown destination has been created by another member of the (E/)MAS configuration.
A route file (Rfnnnn) command is issued to alter the destination for an existing file to be an undefined destination.