Hello.I have been looking into the use of SSI Function Code 10 - Command 
Processing  -.I can build an SSVT, Invoke IEFSSVT,  I can ACTIVATE the 
subsystem, I can register a command prefix, all the housekeeping is in place 
-..Im looking for guidance, best practices, what to avoid, regarding the actual 
Command Processing program -.Lets start start with the command processing 
program communication with an associated address space -What are the pros/cons 
to using a Space Switching PC routine as opposed to scheduling an SRB intothe 
associated address space ? .When to use a Command Prefix with SSI Function Code 
10 over a traditional MVS Modify command using QEDIT ?.What environment (unit 
of work) is SSI Function code 10 invoked TCB or SRB ?.Is there any additional 
documentation of SSI Function code 10 other than Sub system Interface, that 
discusses developing a command processing program ?.paul

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