Implementing User Programs › Control Subsystems › Stop a Subsystem

Stop a Subsystem

A subsystem can be stopped. This allows it to stay defined, but calls are no longer permitted. To stop a subsystem, use the SUBSYS STOP command. When the SUBSYS STOP command is entered, the following occurs:

• If the subsystem is defined with PARMLIST=NEW, a stop call [NCPFFUNC = NCPFFSTM (12)] is made to the program. This allows the program to clean up any important resources.
• The subsystem is detached
• Any pending &CALL requests are rejected. No further &CALL requests are permitted.

A stopped subsystem can be restarted by the SUBSYS START command.