Cancelling AP transactions causing Enc Acctg Hold Issues

Hi.  We have been having issues when attempting to cancel AP transactions - credit memos, debit memos, manually entered invoices.  They don't seem to cancel cleanly and are showing on the Invoices On Hold report with a hold reason of 'Encumbrance Acctg Fail'.  When running the AP Single Transaction Diagnostic Test out of AP for the issue, the following GDF issue results: Invoices on which cancelation was attempted but did not successfully complete. Script: ap_cancel_inv_sel.sql Bug: 13927409 Note: 1060611.1.  Once we apply the GDF associated with the note referenced, the transactions can be cleanly cancelled.  However, it is my belief