The check number had already been used.
This issue can occur depending on your settings and check numbering. For example, this message appears when you try to print check number 1171 when check number 1172 and 1173 have previously been used. If you are paying many invoices, and the Payment Stub Settings in Setup, Vendors, Payment Settings tab is set to List all invoices on stub, check 1171 is available but the task needs to void the next check numbers (checks 1172 and 1173) to use the stubs to list the additional invoices. |