Filelock Error!

This web application uses 'file locks' to ensure than only one user can update data at a time. The program was halted while in the middle of writing/accessing data because it could not obtain a filelock. Please ask your server administrator to fix the permissions (you need read-write access on your data directory).

For your reference, the filelock error was: 'error opening exclusive file lock /home/userC/c0031800/public_html/ Permission denied '.