Unable to delete GL Account - Transactions exist

Unable to delete GL accounts from Account Master, encounter:

Munis
The selected account cannot be deleted.
There are existing transactions associated with this account.
Click OK to generate a report of these transactions.

Select OK to generate report, Display report  opens a blank txt file, PDF does not generate, report will not save to spool

Or report is generated with Transaction Type 'AccountSubAmount'

• Account Master
• AccountSubAmounts
• Munis 2017.1 and above

Budget transactions were created and written to a temporary proof amount table. The amounts are stuck on the table preventing delete of account. 

• MUN-323231 is open with Development to resolve the error.
• Contact General Ledger Support to clear proof amounts from the table.