The program you were running exceeded the DOS limit on
  open files.
 
  If you still want to run this program, do the following:
 
    1. End your program with the Restart (SHIFT+F5)
       command.
    2. Exit QuickPascal.
    3. Set FILES to a larger number in your CONFIG.SYS
       file.
    4. Reboot your machine.
    5. Start QuickPascal again and try to run your
       program.