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6. How to roll back a closed session?
A closed session is one completed set of meter readings for one site and meter type. Each lot in it has one bill.
A rollback voids a whole closed session: its bills are kept but marked void, the lots’ opening readings go back to what they were before the session closed, and customers who already received their bill are automatically emailed a void notice. Use it when the session itself was wrong. For a single wrong reading, use an invoice correction instead (see 7. How to correct an invoice?).
What happens
- Every bill in the session is marked VOID. Nothing is deleted, and the session stays in the list. You can still download the readings in Excel, and all photos are preserved.
- Opening readings are restored to the values before that closed session, so you can upload new readings and close the session again.
- Customers who already received a bill get a void email with the cancelled invoice attached. If you give a reason, it appears in that email; otherwise it says “Administrative correction”.
- Emails not yet sent for the closed session are cancelled.
- Anything already posted to Vilogi is reversed automatically in the background, and anything waiting to post is cancelled.
- Void bills show a red diagonal VOID watermark on their PDF.
How to roll back a closed session
- Open Closed Session and choose the site and meter type.
- On the desired session row, click the red undo icon (Roll back session).
- Read the warning. Optionally enter a Reason (up to 255 characters).
- Click Roll back session. The button shows a spinner while it works.
- A confirmation appears and the list refreshes. The session now shows a red VOID badge and is greyed out.
When the undo icon is missing
The icon only shows when a rollback is allowed. It is hidden when:
- the session is already void;
- a newer session exists for the same lots. Roll back the newest session first, then the older one;
- an Open Session exists for that site and meter. Finish or discard it first. A note above the table says “Session rollback disabled as there is an active open session”.
Messages you may see
| Message | What to do |
|---|---|
| Session already rolled back | Nothing. Refresh the page. |
| Newer sessions exist for the following lots | The window lists the lot numbers. Roll back the newer sessions first. |
| An Open Session is in progress for this site and service | Discard or complete the Open Session, then try again. |
| Accounting entries for the following lots were synced before reversal data was tracked | Reverse those lots manually in Vilogi, then contact support. |
Nothing changes when a rollback is refused, so it is safe to fix the cause and try again.
Void sessions in the lists
- In Closed Session, a void session has a VOID badge and a greyed row. You can still view its readings. The Vilogi column shows Voided, or Reversal pending if some Vilogi entries are still being reversed.
- Void lots are left out of totals, previous-reading history and bulk exports.
- A void session can never be emailed or posted to Vilogi.
Rollback or correction?
- One lot has a wrong reading: correct the invoice.
- Many lots or the whole session is wrong, or the lot cannot be corrected (main meter, some tanker sessions): roll back the session, then read and close it again.
- The bills are right but only the accounting entries are wrong: reverse the Vilogi postings instead (see Vilogi accounting integration).
If a session still reads Reversal pending after several minutes, contact support.