DFS3798 SB NOT INITIALIZED

Explanation
 A /START SB command was not
processed because a SBONLINE control statement was not provided in
member DFSVSMxx of IMS.PROCLIB.

System action
 IMS has not loaded any Sequential
Buffering (SB) modules and does not process the /START SB command.

User response
 Provide a SBONLINE control statement in the appropriate
DFSVSMxx member of IMS.PROCLIB if you want to use SB.