AGMZ0000E `subsys` Subsystem is Already Active

Explanation
The Z APM Connect Base has attempted
to start, but the subsystem is already in use by another Z APM Connect Base. Message
Variables: subsys – Z APM Connect Base subsystem.

System action
 The Z APM Connect Base startup
is aborted.

Administrator response
Verify that the Z APM Connect Base subsystem
specified in the Z APM Connect Base startup
JCL is correct, and the Z APM Connect Base has not
already been started.