Summary
Description
Below are some steps to check if the opening balance in your bank reconciliation window has been changed.
Resolution
Go to Period End Routines, Bank Reconciliation and then select Unreconcile Bank Transactions
To capture all reconciled transactions set the Date from: to '01/01/1989' and the Date to: to '31/12/2099'.
Then select Check All and make a note of the Selected Balance.
Go to Period End Routines, Bank Reconciliation and then select Bank Reconciliation.
Compare the Selected Balance against the Opening Balance
If there is a difference, reduce or increase the opening balance by this value.
If there isn't a difference, then your opening balance hasn't been changed. You should continue to investigate your transactions and bank statement, in order to find out why your reconciliation doesn't balance.