What AP interface table Payables Transfer to General Ledger process uses?

Hi there,

I have an ap interface error for Payables Transfer to General Ledger process and I need to locate the problem transaction.  The error simply said a very old period (6 year old) is not open which seems very strange.

I just wonder if Payables Transfer to General Ledger uses any interface table or it directly get the invoices/paymants information from AP tables?  Our ap_invoices_interface table is empty.

If it doesn't use any interface table, what is the package name?  I thought it is AP_PPPST_PKG but when I checked the code, it doesn't seems that is the case.