Click the "CHARTS" button on the Status bar. On the InstantAccess bar click "System", "Clear Charts" and "ENC" buttons.
In addition it is recommended to remove all permits from the system. Select "Licenses" on the Home screen and then in the "Licenses" window, right-click on the block to left of the "Cell Name". Two options appear "Select All" and "Deselect All", choose "Select All" and click "Delete Licenses"
You may need to perform this on all stations.