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COMPATIBILITY CHECKPOINT_OVERLAP
A change to the checkpoint logic now causes checkpoint requests to wait for the completion of an in-process checkpoint before beginning even flushing operations. If the checkpoint is called from the CTCHKPNT() API, and it finds an in-process checkpoint, then it simply returns with NO_ERROR and sets sysiocod to OCHK_COD (-885). If an internal checkpoint request must wait, a counter is incremented; and the total count is reported in CTSTATUS.FCS at the end of the final checkpoint (if it is nonzero). This keyword disables the new behavior.
