2594 [NetworkDiagnosticsThread] ERROR common.NetworkDiagnostics - The network diagnostics process has failed with the following exception

net.java.stun4j.StunException: An Exception occurred while sending message bytes through a network socket!

at net.java.stun4j.stack.NetAccessManager.sendMessage(NetAccessManager.java:397)

at net.java.stun4j.stack.StunClientTransaction.sendRequest(StunClientTransaction.java:205)

at net.java.stun4j.stack.StunProvider.sendRequest(StunProvider.java:95)

at net.java.stun4j.client.BlockingRequestSender.sendRequestAndWaitForResponse(BlockingRequestSender.java:79)

at net.java.stun4j.client.NetworkConfigurationDiscoveryProcess.doTestI(NetworkConfigurationDiscoveryProcess.java:284)

at net.java.stun4j.client.NetworkConfigurationDiscoveryProcess.determineAddress(NetworkConfigurationDiscoveryProcess.java:186)

at net.java.sip.communicator.common.NetworkDiagnostics.run(NetworkDiagnostics.java:94)

Caused by: java.lang.NullPointerException: null address || null buffer

at java.net.PlainDatagramSocketImpl.send(Native Method)

at java.net.DatagramSocket.send(DatagramSocket.java:611)

at net.java.stun4j.stack.NetAccessPoint.sendMessage(NetAccessPoint.java:200)

at net.java.stun4j.stack.NetAccessManager.sendMessage(NetAccessManager.java:393)

... 6 more

Thanks

Rajesh