What does "Cannot use a date before the current month!" mean?
The system will not allow you to create a check dated prior to the current period. You will need to verify the date of the check and make sure it is not before the current month. You can verify the current month by clicking the Ledgers and Payables tab, it is located just below the menu buttons. You can also see the current month and year in the upper right corner, under the Home and Logout buttons.