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What variable controls the sequence number value on the last output block?

CATEGORY: PROGRAMMING
TYPE: CONTROLLER
IMS VERSION: ALL
PLATFORM: ALL

The IMSpost system variable SYSTEM.SEQNO is continuously updated with the last sequence number value that was output.
Another system variable, SYSTEM.SEQNO_ON, will be set to 1 if sequence numbering is on, and to 0 if sequence numbering is off.

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