This is only applicable if you have chosen to archive your transactions in the purchase ledger settings.
If this is the case, archived supplier transactions are stored in a separate archive file once they have exceeded their history length on the supplier's account. From time to time you need to delete transactions from the archive file to improve the processing speed on the ledger. Depending on your disk space you may need to perform this activity annually, quarterly or even on a monthly basis.
You can choose to:
You must have:
Open: Purchase Ledger > Utilities > File Maintenance > Purge Transactions.
Choose to delete transactions from a single account or from all accounts on the ledger.
If you have selected to delete a single account, choose the account you want to delete the transactions from.
If you want to delete a range of archived transactions, enter a date range. To delete all transactions for a supplier leave the date range boxes blank.
Overview
Other tasks
Delete archived transactions (Sales Ledger)
Delete archived sales and purchase orders and returns
Delete archived batch/serial history
Reference