This error occurs for one of two reasons: ■ You attempted the DOS Shell command from the File menu and QuickPascal can't find COMMAND.COM in the location specified in the COMPSPEC environment variable. Set COMPSPEC to the appropriate directory path. ■ You chose <Yes> from the "Not enough memory to debug, Execute anyway?" dialog box, and there is a problem with the executable program. Recompile the program to create a new executable.