Example:

       $ SPAWN
       $ GTM
       GTM>ZAT
       $ SHOW PROCESS/SUB
       ...
       There are 2 processes in this job:
       KEANE (*)
       KEANE1
        

This demonstrates an argumentless ZATTACH to the master process. The DCL command SHOW PROCESS /SUB displays the subprocess structure.

Example:

       GTM>ZSYSTEM "GTM"
       %GTM-I-BREAK, Break instruction encountered
       At M source location +1^GTM$DMOD
       GTM>SET $ZPROMPT="SPGTM> "
       SPGTM>WRITE $ZPROCESS
       MIKE_1
       SPGTM>ZATTACH
       GTM>ZAT "MIKE_1"
       SPGTM>HALT
       GTM>
        

This demonstrates a simple test of ZSYSTEM and ZATTACH, using ZSYSTEM to start a GT.M spawned process. SETting $ZPROMPT modifies the GTM> prompt to make it easier to tell which process we're in. The ZATTACH with no argument returns us to the master process of the job. Then the ZATTACH with an argument gives control to the spawned process. The HALT terminates the spawned process and returns control to the master process.