Error Received when Printing Checks

This error indicates that one or more of the check numbers in the range you are using has already been used. 

To locate the check number, try running a Check Register for the Bank (include Voided Checks). If you don't see the check numbers listed, you may have to go back a year. Once you identify the check(s) that is/are in use, adjust your range of checks for the check run.