Start Threshold Migration only works on an 'Active' file system. If you want to make file-system file system 'Active', select 'Reactivate'.
You tried to start Threshold Migration on an "Inactive" file system (a file system for which space management has been deactivated). You must reactivate space management for your file system first.
Processing stopped.
Select OK to return. Select 'Reactivate' to reactivate space management for the file system.