If the software opened this help page - it appears that your calendar is near the end and you have to add more periods.
Do not ignore this message.
You will not be able to import again into a future period if you do not perform maintenance.
Adding Periods
All Treasury Software products have a built in calendar - called 'Periods'.
Periods are typically the end of each month. If you run the 'Periods' report, it might look like:
To add periods:
Enter into an account (repeat for each account)
One at a time
From the main menu select File > Maintenance > Periods tab
Follow the directions below:
or
Import a file
From the main menu select Import > Period List
Follow the directions below:
Congratulations. All done!