SQL error: attempt to write a readonly database

http://stackoverflow.com/questions/1518729/how-to-change-sqlite-database-mode

There can be several reasons for this error message:

1.Several processes have the database open at the same time (see the FAQ).(多个进程同时访问数据库)

2.There is a plugin to compress and encrypt the database. It doesn’t allow to modify the DB.

3.Lastly, another FAQ says: “Make sure that the directory containing the database file is also writable to the user executing the CGI script.” I think this is because the engine needs to create more files in the directory.