How to check what account is missing: 

1. Click Properties menu
2. Click Post submenu
3. Click the Invoice order total $ amount
4. Check what gl account is missing

To map or assign the GL account :

1. Click Formulas menu
2. Click Comm. GL # submenu
3. Choose the accounting code from the dropdown
4. Locate unassigned deduction under account
   • assign by clicking the blank space and choose the account from the dropdown list
5. Click save

When user go back to the property, it should be ready to post without any error