Implementing User Programs › About the SUBSYS Facility › Use &CALL With SUBSYS

Use &CALL With SUBSYS

To counter the disadvantages of using &CALL, you can use the SUBSYS facility. This provides the following:

• The target program is only attached once and all work is queued to it
• The target program can easily keep files open
• The target program is informed of NCL process termination, and of subsystem start and stop. It is also notified of system shutdown.

The SUBSYS program is attached once, as a long-running task so that you can open files, get storage, and so on. These resources are not released when you return.