This error will occur if the previous reconciliation done for this account is via the Save And Reconcile Later option. In order to reconcile the account, you need to complete that reconciliation first. Go to Reconciliation History. You could find the top most Reconciliation with the status In-Progress. Click on that reconciliation, cross check the reconciliation details and click on the Reconcile button.
Books
VAT ready accounting
software for small
businesses.