While installing Simulink support package for Arduino in MATLAB 2013b, I am encountering some errors of java exception whose logs can be found below. I am not able to fully download and install the support package. Please solve my query??

Exception in thread "Thread-111" java.lang.NullPointerException at com.mathworks.net.transport.MWTransportClientPropertiesFactory$1.getPasswordAuthentication(MWTransportClientPropertiesFactory.java:86) at java.net.Authenticator.requestPasswordAuthentication(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection$1.run(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.net.www.protocol.http.HttpURLConnection.privilegedRequestPasswordAuthentication(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getHttpProxyAuthentication(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.resetProxyAuthentication(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at com.mathworks.toolbox.shared.hwconnectinstaller.util.download.DownloadRunner.run(DownloadRunner.java:219) at java.lang.Thread.run(Unknown Source)