When trying to print checks after closing the year in the AP module you receive a message about the 1099 calendar year.
Use the 1099 Calendar Year Control screen to confirm the two open 1099 years. The year you are attempting to print the check for should be one of these two open years. If not, use the Purge the Oldest year option to roll the years forward one year (assuming that will then capture the year needed to print the check). Once completed, close the screen. Reopen the screen to see that you have the two correct years with one of the years being the year you are attempting to print this check for. You then will be able to print checks.