In the setup of a grant record, the reimbursement tab should have specific product and billing items defined for reimbursement. Each item can have specific accounts defined where the system looks for activity when creating the AR transactions.  If more than one product or billing item on the same grant has the same account number defined, this exception would occur.

To resolve, edit the designated account (or accounts) to remove the overlap.

1. In Records > Grants > Open the Grant record
2. Select the reimbursement tab
3. Click to highlight the row for each of the products specified in the exception and compare them to the existing products. Once the row is highlighted, review the account settings at the bottom of the window to confirm which accounts are specified.
4. Once the editing is complete, save and close the grant record
5. View the transactions > Preview the Pre-Generation report