This can occur when that GL account is missing from the Master Chart of Accounts. To fix this;
1) Click on File Maintenance
2) Go to General Ledger> Master Chart of Accounts Maintenance
3) Add the missing GL Account and Save
4) Go back to the Accounts Payable Reconciliation Tab
5) Account should now show.
Steps to Duplicate1) Log into FIMS'
2) Go to the Accounts Payable Module
3) Select the Reconciliation Supertab
4) Checking Account is missing