I’ve the same problem with a fresh new installation of OpenHABian on Raspberry
2018-12-30 12:29:11.977 [ERROR] [rnal.discovery.RFXComBridgeDiscovery] - Error occurred during discovery
**java.io.IOException: device not found (2)**
at jd2xx.JD2XX.listDevices(Native Method) ~[208:org.openhab.binding.rfxcom:2.4.0]
at jd2xx.JD2XX.listDevicesByDescription(JD2XX.java:826) ~[208:org.openhab.binding.rfxcom:2.4.0]