Cumulus Support

Sorry but i need a hint because i get following error message:

Current culture: English (United Kingdom)
Serial: 74FECEABEB2DA94ECB5EBA0CD11A7137
Cumulus MX v.3.0.0 build 3042
Today.ini = data/today.ini
Last update=2017-02-18T13:57:00
Looking for Fine Offset station, VendorID=0x1941 ProductID=0x8021
sysname=Linux release=4.4.34 machine=armv7l
Fine Offset station found
Connected to station
[ERROR] FATAL UNHANDLED EXCEPTION: System.Net.Sockets.SocketException: Address already in use
at System.Net.Sockets.Socket.Bind (System.Net.EndPoint local_end) [0x00000] in <filename unknown>:0
at System.Net.EndPointListener..ctor (System.Net.IPAddress addr, Int32 port, Boolean secure) [0x00000] in <filename unknown>:0
at System.Net.EndPointManager.GetEPListener (System.String host, Int32 port, System.Net.HttpListener listener, Boolean secure) [0x00000] in <filename unknown>:0
at System.Net.EndPointManager.AddPrefixInternal (System.String p, System.Net.HttpListener listener) [0x00000] in <filename unknown>:0
at System.Net.EndPointManager.AddListener (System.Net.HttpListener listener) [0x00000] in <filename unknown>:0

any Ideas?
regards
holger

Loaded Cumulus twice?