When an OPEN or USE command includes no mnemonic space argument, Caché uses the default mnemonic for that device type. The Others setting specifies the default mnemonic for device types other than magnetic tape, terminal, or sequential file.
The value n is a Caché routine name. ^%X364 is the default when the device is not a magnetic tape drive, terminal, or sequential file. You can use this default, or reset it by changing the value of as needed. See the “Controlling Devices with Mnemonic Spaces” chapter in the Caché I/O Device Guide.
As described above.
On the page System Administration > Configuration > Device Settings > IO Settings, in the Other row, enter a Caché routine name.