Hello,
Most likely, an invoice has been incorrectly entered into the system, thus not allowing for it to be accounted for properly in the P&L. Check to make sure that accounts for Vendors are properly entered, that all invoices have been properly entered, review prepayments and on accounts settings and transactions.
You can run both reports for shorter periods to identify when the discrepancy occurs and from there drill down into the specific transactions to identify why, where and how this is occurring.
Kind regards,
HansaWorld Support Team