Comfoair+openhab+rs232

Hello

I can not connect via rs232 with openhab
this is my log:
2017-09-01 23:17:35.479 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request: 07 f0 00 cd 00 7a 07 0f Response: null
2017-09-01 23:17:35.490 [ERROR] [.comfoair.handling.ComfoAirConnector] - Inappropriate ioctl for device in nativeavailable
java.io.IOException: Inappropriate ioctl for device in nativeavailable
at gnu.io.RXTXPort.nativeavailable(Native Method)
at gnu.io.RXTXPort$SerialInputStream.available(RXTXPort.java:1568)[183:com.neuronrobotics.nrjavaserial:3.12.0.OH]
at java.io.BufferedInputStream.available(BufferedInputStream.java:410)[:1.8.0_121]
at java.io.FilterInputStream.available(FilterInputStream.java:168)[:1.8.0_121]
at org.openhab.binding.comfoair.handling.ComfoAirConnector.sendCommand(ComfoAirConnector.java:175)[184:org.openhab.binding.comfoair:1.10.0]
at org.openhab.binding.comfoair.internal.ComfoAirBinding.sendCommand(ComfoAirBinding.java:156)[184:org.openhab.binding.comfoair:1.10.0]
at org.openhab.binding.comfoair.internal.ComfoAirBinding.execute(ComfoAirBinding.java:143)[184:org.openhab.binding.comfoair:1.10.0]
at org.openhab.core.binding.AbstractActiveBinding$BindingActiveService.execute(AbstractActiveBinding.java:157)[185:org.openhab.core.compat1x:2.1.0]
at org.openhab.core.service.AbstractActiveService$RefreshThread.run(AbstractActiveService.java:169)[185:org.openhab.core.compat1x:2.1.0]
what should I do ?