This issue occurs when a user does not have access to edit bank accounts in Administration and there is a blank or invalid Next Number defined for this bank account's details.

  1. Login as a user with Edit rights to Bank Accounts.
  2. Click Edit Account Details in the Banks module.
  3. Click the Payments tab.
  4. Enter a value in the "Next Number" field for EFTs.
  5. Save and Close the bank account details.