Could not determine platform and Runtime exception

Uncaught Exception detected.

Configuration:
JHelioviewer - Version: 2.2.1
JHelioviewer - Revision: 477
Java Virtual Machine - Name: Java HotSpot(TM) Client VM
Java Virtual Machine - Vendor: Sun Microsystems Inc.
Java Virtual Machine - Version: 20.5-b03
JRE Specification - Version: 1.6
Operating System - Name: SunOS
Operating System - Architecture: x86
Operating System - Version: 5.11

Date: Sat Jun 02 05:27:31 GMT 2012
Thread: Thread[main,5,main]
Message: null

Stacktrace:
java.lang.NullPointerException
at org.helioviewer.jhv.JavaHelioViewer.main(JavaHelioViewer.java:134)
at org.helioviewer.jhv.JavaHelioViewer.main(JavaHelioViewer.java:46)

Log:
2012-06-02 15:27:30,463 [main] INFO root - JHelioviewer started with command-line options:
2012-06-02 15:27:30,465 [main] INFO root - Create directories...
2012-06-02 15:27:30,472 [main] INFO root - >> JHVGlobals.determineVersionAndRevision() > Look for jar file: /home/rs18485/bin/JHelioviewer.jar
2012-06-02 15:27:30,474 [main] INFO root - Initializing JHelioviewer
2012-06-02 15:27:30,477 [main] DEBUG root - Create splash screen
2012-06-02 15:27:30,910 [main] DEBUG root - Number of progress steps: 10
2012-06-02 15:27:30,911 [main] INFO root - Load settings
2012-06-02 15:27:30,993 [main] DEBUG root - >> Settings.load() > Load default system settings: {API.event.path=http://helioviewer.org/api/, API.dataSources.path=http://helioviewer.org/api/?action=getDataSources&verbose=true, connection.read.timeout=180000, export.software.rendering=false, default.remote.lib.path=http://jhelioviewer.org/libjhv/, jvm.arguments=-Xmx1024m -Dapple.laf.useScreenMenuBar=true, default.basicRemote.path=jpip://helioviewer.org:8090, API.jp2images.path=http://helioviewer.org/api/index.php, default.httpRemote.path=http://helioviewer.org/jp2/, jpip.cache.size=0.0, opengl.enabled=true, API.jp2series.path=http://helioviewer.org/api/index.php, connection.connect.timeout=60000, update.check.next=0, default.remote.path=jpip://helioviewer.org:8090, display.toolbar=iconandtext, default.date.format=yyyy/MM/dd, startup.loadmovie=true, VSO.showInfo=true, VSO.showAdvanced=false}
2012-06-02 15:27:31,004 [main] ERROR root - >> Platform > Could not determine platform. OS: sunos - arch: x86
2012-06-02 15:27:31,005 [main] INFO root - OS: null - arch: null - java arch: 32
2012-06-02 15:27:31,006 [main] FATAL root - Runtime exception
java.lang.NullPointerException
 at org.helioviewer.jhv.JavaHelioViewer.main(JavaHelioViewer.java:134)
 at org.helioviewer.jhv.JavaHelioViewer.main(JavaHelioViewer.java:46)