Disallowing the use of SB

An IMS system programmer or MTO can disallow the use of SB.

When the use of SB has been disallowed, a request for conditional activation of SB is ignored.

There are three ways to disallow the use of SB. The following list describes the three methods:

Procedure

  1. An SB Initialization Exit Routine can be written (or a sample exit routine adapted) that can dynamically disallow and allow use of SB. This method can be used if you are using SB in an IMS batch, online, or DBCTL environment.
  2. The MTO commands /STOP SB and /START SB can be issued to dynamically disallow and allow use of SB within an IMS online subsystem
  3. The SBONLINE control statement can be omitted from the DFSVSMxx member. This will keep IMS from loading the SB modules into the online subsystem. No program in the online subsystem will be able to use SB.