Thank you for your reply. The only cause in your list that's even remotely possible is that that, following an update yesterday, my data has been damaged. Last week, all accounts were reconciled successfully. I had done no data entry prior to yesterday so since the accounts were properly reconciled last week and now the ending balance from the previous reconciliation is wrong and there are five transactions that were not in there last week, something happened when I updated the software.  I rolled back to the backup I did last week before I entered data yesterday, but all that did was delete the transactions I entered yesterday; the ending balance from the last reconciliation is still wrong. How can I revert to the account prior to the software update?  The only explanation I can come up with is that the software update corrupted my data. Thank you for your help.