GLO1073W Maximum active subsystems exceeded (4).

Explanation
 The current iteration of Advanced Allocation Management that
is being started exceeds the limit of four concurrently active subsystems
on a single z/OS® system. Startup
for the current iteration stops. 

User response
 If the current iteration of Advanced Allocation Management is
required, shut down one of the active Advanced Allocation Management subsystems
and then restart the current iteration. 
To display all active Advanced Allocation Management subsystems
use the display,subsystems,all command or select
option 2 (View/Update Options) from the from
the Tivoli® Advanced Allocation Management Primary
Option Menu.