I am trying to reconcile accounts payable and for some reason the amount on the General Ledger Trail Balance does not match the AP Aging. I printed the A/P Open Item and that does not balance either. I compared the AP aging to the AP Open Item report and noticed there are some things on the the aging that is not on the Open item report. They are both printed based on the invoice date for December 2012. These have always balanced prior to 2012, what am I doing wrong.