CCSv4 Debug Exception "Error within Debug UI"

Hi,

I am having problem in debugging MSP430F5529 with CCSv4(Latest Version).

Everytime when I press the debug button, I am getting an error saying  "Error within Debug UI".

Exception occurred during launch

Reason: Error within Debug UI:

Java.lang.reflect.InvocationTargetException

A month back it was working fine and now with this error I am not able to debug the project.

I am using Windows Vista and the CCS is installed in Program files(with UAC disabled)

CCS versio:v4.2.3

CGT Version:v3.3.3 

License Type: Full MCU version

A part of the error log from "workspace->.metadata->.log" is shown below.

I found the statement saying 

"Caused by: java.lang.NoSuchMethodError: com.ti.debug.engine.cce.CCEDebugEngine.instance()Lcom/ti/debug/engine/IApplication;"

Please help me to solve this issue.

Log file

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Root exception:

java.lang.NoSuchMethodError: com.ti.debug.engine.cce.CCEDebugEngine.instance()Lcom/ti/debug/engine/IApplication;

at com.ti.dvt.cceideadapter.CCEIDEAdapter.getCCStudioApplication(CCEIDEAdapter.java:226)

at com.ti.dvt.cceideadapter.CCEIDEAdapter.debugServerStarted(CCEIDEAdapter.java:446)

at com.ti.dvt.cceideadapter.DebugSessionHandler.debugServerStarted(DebugSessionHandler.java:36)

at com.ti.ccstudio.debug.server.extensions.session.DebugSessionController.notifyDebugServerStarted(DebugSessionController.java:152)

at com.ti.ccstudio.debug.server.extensions.session.DebugSessionController.notifyTaskStarted(DebugSessionController.java:175)

at com.ti.ccstudio.debug.core.cdi.model.TaskProxy.initialize(TaskProxy.java:536)

at com.ti.ccstudio.debug.core.cdi.model.Thread.<init>(Thread.java:54)

at com.ti.ccstudio.debug.core.cdi.model.DeviceThread.<init>(DeviceThread.java:11)

at com.ti.ccstudio.debug.core.cdi.model.DeviceTarget.<init>(DeviceTarget.java:90)

at com.ti.ccstudio.debug.core.cdi.model.Session.createDeviceTarget(Session.java:790)

at com.ti.ccstudio.debug.core.cdi.model.Session.internalInitializeSession(Session.java:376)

at com.ti.ccstudio.debug.core.cdi.model.Session.initializeSession(Session.java:305)

at com.ti.ccstudio.debug.core.cdi.model.Debugger.createDebuggerSession(Debugger.java:27)

at com.ti.ccstudio.debug.core.launch.BaseCCELaunchDelegate.doLaunch(BaseCCELaunchDelegate.java:321)

at com.ti.ccstudio.debug.core.launch.BaseCCELaunchDelegate.launch(BaseCCELaunchDelegate.java:267)

at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:657)

at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:583)

at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:779)

at org.eclipse.debug.internal.ui.DebugUIPlugin$4.run(DebugUIPlugin.java:835)

at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:113)

!SESSION 2011-06-08 09:25:28.408 -----------------------------------------------

eclipse.buildId=4.1.2.00027

java.version=1.5.0_14

java.vendor=Sun Microsystems Inc.

BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=ja_JP

Command-line arguments:  -os win32 -ws win32 -arch x86 -clean

!ENTRY org.eclipse.debug.ui 4 120 2011-06-08 09:26:48.294

!MESSAGE Error within Debug UI: 

!STACK 0

java.lang.reflect.InvocationTargetException

Best Regards,

Paddu.