Quintus Prolog

The License Directory

The licensing system maintains two files in the directory QuintusDir/license3.5:

license.qof: contains the license code(s)
users.qof: maintains a list of users of Quintus Prolog

The users.qof file is written to each time an "occasional" user invokes prolog or qpc, where an "occasional" user is one who has not used the product more than five times.

If QuintusDir resides on a file system that is mounted read-only on any machines where Quintus Prolog is run, then the license directory should be replaced with a symbolic link to a directory on a filesystem that is writable before running qplm. This is illustrated by the following commands, where QuintusDir is /opt/quintus and the license directory is moved to /var/quintus/license3.5:

     % rmdir /opt/quintus/license3.5
     % mkdir /var/quintus/license3.5
     % ln -s /var/quintus/license3.5 /opt/quintus/license3.5

Please note: The users.qof file is intended as an aid for you to remain in compliance with your product license. Circumventing it, for example by deleting regular users or making it unwritable, does not bring you in compliance with your license.