After a database restore (though may occur in other circumstances) a database backup with the checkers enabled or an "..\netvault\util\nvscheddbcheck.exe -check" run produce errors similar to the following:
Policy 'Windows' Job 'Windows_Weekly' uses plugin 'File System', that is not installed
The Clients are up and running and the listed plugin is installed.
The correct information as to which plugins are installed on which Clients may have gotten lost, causing problems when checking the NetVault Scheduler Database for accurate information regarding the Clients associated with the Policy listed in the error message.
Remove the Clients, then save the policy , then re-add all of the Clients to the problematic Policy. Then re-run the "..\netvault\util\nvscheddbcheck check" again to verify that modified Policy disappears from the output of the NetVault Scheduler Database check.
