You're welcome Chris
Besides z/OS static system symbols you could use other type of variables in the action clauses.
This is fully documented in the User Guide chapter 7 'Using System State Manager' item 'Specify Variables in Action Clauses'
I believe one example uses a global prefix of GLOBAL0.
Just visit OPSVIEW 4.8 to confirm the ones you are planning to use are defined and contains the values you wish to use in your action clauses.
Hope this helps clarify much better your original question.
Regards, Cesar