and after a while, this one appears:
WARN 2013-05-14 10:58:13,757 (com.serotonin.mango.rt.dataSource.modbus.ModbusDataSource.receivedException:385) - Modbus exception java.net.SocketException: Unrecognized Windows Sockets error: -1: socket available at java.net.PlainSocketImpl.socketAvailable(Native Method) at java.net.PlainSocketImpl.available(PlainSocketImpl.java:472) at java.net.SocketInputStream.available(SocketInputStream.java:217) at com.serotonin.messaging.InputStreamListener.run(InputStreamListener.java:63) at java.lang.Thread.run(Thread.java:662)U