Because the QB updates had been previously done, l tried unsuccessfully for over two hours to print the 1099s--but then tried this and it worked:

Turn off printer.

Go into QuickBooks, Help, then Update QuickBooks Desktop.

Select the Options tab, and check the Mark All button.

Click the Update Now tab, then put a checkmark on the Reset Update box.

Hit Get Updates. Once the update is complete, restart your computer. Turn on printer.

(These posts need actual dates rather than time hacks like "3 weeks ago"--especially when they have been going on for years!)