Nikobus binding error status update

openHAB 2.3.0 Release Build + Ubuntu 17.10

I had to do a re-install due an broken harddisk. Everything back in order now, except one thing. Nikobus does not do a status update

Errors:

17:42:31.848 [ERROR] [nding.nikobus.internal.NikobusBinding] - Error occurred during scheduled status refresh.
java.util.concurrent.TimeoutException: No ACK received within timeout and retry count.
        at org.openhab.binding.nikobus.internal.core.NikobusAckMonitor.waitForAck(NikobusAckMonitor.java:92) [219:org.openhab.binding.nikobus:1.12.0]
        at org.openhab.binding.nikobus.internal.NikobusBinding.sendCommand(NikobusBinding.java:155) [219:org.openhab.binding.nikobus:1.12.0]
        at org.openhab.binding.nikobus.internal.NikobusBinding$2.run(NikobusBinding.java:288) [219:org.openhab.binding.nikobus:1.12.0]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:?]
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [?:?]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [?:?]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:?]

Please help

Solved, i had no serial connection