The event notification was what I was looking for 

> On Aug 14, 2024, at 10:17 AM, Scott Ballentine <[email protected]> wrote:
> 
> On Tue, 13 Aug 2024 21:40:45 +0300, Binyamin Dissen 
> <[email protected]> wrote:
> 
>> "FORCE - For the SETSSI DELETE command, a required parameter that specifies
>> that the subsystem is to be removed. This command should be used with care, 
>> as
>> removing a subsystem may result in loss of system function."
>> 
>> One wonders what the "loss of system function" is.
>> 
>> That is why I advised changing on letter to something that wouldn't be in a
>> real subsystem. That way the hash function will still pass thru it but not
>> match.
>> 
>> Of course, the function codes in the SSVT should be disabled.
> 
> The "loss of system function" isn't referring to subsystem name hashing (and 
> the SETSSI DELETE command should take care of that kind of cleanup anyway).  
> That statement is really referring to whatever function the subsystem 
> provides - so if you delete some really important subsystem that you need to 
> run the system, you might not have a usable system anymore.  Also, not every 
> subsystem supports being added dynamically, so if you delete one of those 
> subsystems, you're out of luck.  
> 
> Scott Ballentine ([email protected])
> z/OS MVS Development
> 
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