Soap UI 4.6.0 Datasink Excel problem,Not able to write

Soap UI 4.6.0 Datasink Excel problem,Not able to write anything in excelsheet

Hi All ,
While writing data to excel using data sink, I am not able to write anything into Excel. This is working fine in previous version 4.5.1

During the operation data log generated fine, but ArrayIndexOutOfBoundsException is observed in error log as below.

Mon Oct Mon Oct 07 15:27:46 IST 2013:ERROR:java.lang.ArrayIndexOutOfBoundsException
java.lang.ArrayIndexOutOfBoundsException
at java.lang.System.arraycopy(Native Method)
at jxl.biff.StringHelper.getBytes(StringHelper.java:127)
at jxl.write.biff.WriteAccessRecord.<init>(WriteAccessRecord.java:59)
at jxl.write.biff.WritableWorkbookImpl.write(WritableWorkbookImpl.java:726)
at com.eviware.soapui.impl.wsdl.teststeps.datasink.ExcelDataSink.finish(SourceFile:255)
at com.eviware.soapui.impl.wsdl.teststeps.WsdlDataSinkTestStep.finish(SourceFile:250)
at com.eviware.soapui.impl.wsdl.panels.teststeps.DataSinkDesktopPanel$TestAction.actionPerformed(SourceFile:303)
at com.eviware.soapui.impl.wsdl.panels.teststeps.DataSinkDesktopPanel$TestAction.actionPerformed(SourceFile:273)
at com.eviware.soapui.impl.wsdl.actions.iface.AbstractSwingAction.actionPerformed(AbstractSwingAction.java:73)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)



Please suggest any work around avaible for this.

Thanks