minim server no longer on Melco

[nrwatson]

Simon I have sudden lost minim server on my MELCO
the error log is

MinimServer 0.8.3 update 75, Copyright © 2012-2015 Simon Nash. All rights reserved.
Java™ SE Runtime Environment (build 1.8.0_65-b17)
Java HotSpot™ Client VM (build 25.65-b01, mixed mode)
Platform default charset is US-ASCII
Language setting is 'en'
Current time is Mon Jan 04 21:16:24 GMT 2016 in time zone Europe/London
Context: unable to save property minimserver.lastIndexTags to file /mnt/system/config/Apps/minimserver/data/minimserver.config: save error java.io.IOException: No space left on device
MinimServer error: now stopped, use 'restart' or 'exit'

There seems to be plenty of space on the Server only 25% used
Thanks Neale