We have DCFM 10.4.1 that manage SAN768b and SAN384b.
We had a EMC storage connected on SAN384, but it has been shutdown since last year. All zones has been delete, however the DCFM (I don't know why) couldn't realize that this storage is not attached anymore.
How can I clean this information from DCFM.
I reckon that you need to Accept the change in the Fabric. Try to right-click the device and select Accept change. Maybe it can also be done fabricwide, take a look if there is an Accept Changes button somewhere in the GUI.