There is not enough memory for QuickPascal. Check that you are not running QuickPascal from a shell──using the DOS Shell command in the File menu. If that isn't the problem, try to restart QuickPascal using the /SWAP:DISK option as follows: QP /SWAP:DISK The /SWAP:DISK option tells QuickPascal to store a temporary file that it uses on disk rather than keeping that file in memory. Note that the temporary file requires one megabyte of disk space.