About Open Entries related to Purchase Order

1. Release Purchase Order to Invoicing.

2. Create a "Purchase Invoice Entry" in session tfacp2600m000. Now a record is getting created in session "Business Partner - Open Entries" i.e. tcacp2522m000. The Status of Invoice is "Registered" now.

You can also check the "Non-Finalized Transaction Lines" session to see which ledgers will get debit and credit entry.

3. Now Finalize the Batch. The "Business Partner - Open Entries" record is still in "Registered" status.  And the transactions are now moved to "Finalized Transaction Lines".

4. Now "Match the Purchase invoice". Status of line in "Business Partner - Open Entries" becomes "Matched". And the transactions remain unchanged in "Finalized Transaction Lines".

5. Now "Approve the Purchase invoice". Status of line in "Business Partner - Open Entries" becomes "Approved". And the transactions remain unchanged in "Finalized Transaction Lines".