Voucher Closure - Missing GL entry

Does anyone have any idea why a journal entry wouldn't have been created when a voucher had been closed? See attached screenshots.

The voucher accounting entries for the closure never went to the general ledger,
but it is also not on the open liabilities report.  This is part of the
problem.  AP user is reconciling the G/L to the open liability report, and the
G/L has a payable for this voucher in it, but A/P doesn’t have it. 

Kristen