"System.Runtime.InteropServices.SEHException" while replaying Citrix Nfuse scripts

Hello All,

We are facing an issue while replaying Citrix NFuse scripts. While the script executes, it intermittently fails with the following exception.

System.Runtime.InteropServices.SEHException (0x80004005): External component has thrown an exception.
   at drv_run()
   at CCIDebugger.Driver.Run() in e:\lt\lt-lr\win32_release\12.0.1362.0_clean\app\vugen\backend\current\debugger\cci_debugger\driver.h:line 75
   at HP.LR.Vugen.BackEnd.Debugger.VuGenCciDebugger.CciDebuggerPlugin.SafeRunDriver() in e:\LT\LT-LR\win32_release\12.0.1362.0_clean\app\VuGen\BackEnd\Current\Debugger\cci_debugger_plugin\CCIDebuggerPlugin.cs:line 642

A look at the HP.LR.Vugen.log file revealed the following-

2015-03-19 10:45:05,369 DBG           [ 34] ERROR - Debugger process Process Cleanup error
System.ComponentModel.Win32Exception (0x80004005): Access is denied
   at System.Diagnostics.Process.Kill()
   at HP.Utt.Debugger.UttStandaloneDebuggerProcessManager.Cleanup() in e:\LT\UTT\win32_release\12.0.776.2\src\Infra\app\UttDebugger\UttStandaloneDebuggerProcessManager.cs:line 286
2015-03-19 10:45:06,378 DBG           [ 34] ERROR - Debugger Cleanup command error while closing Debugger Callback Context
System.TimeoutException: Close process timed out waiting for service dispatch to complete.
   at System.ServiceModel.ServiceChannelManager.CloseInput(TimeSpan timeout)
   at System.ServiceModel.ServiceChannelManager.OnClose(TimeSpan timeout)
   at System.ServiceModel.Channels.LifetimeManager.Close(TimeSpan timeout)
   at System.ServiceModel.InstanceContext.OnClose(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
   at HP.Utt.Debugger.UttDebuggerImp.Cleanup() in e:\LT\UTT\win32_release\12.0.776.2\src\Infra\app\UttDebugger\UttDebuggerImp.cs:line 287
2015-03-19 11:07:09,798 DBG           [ 31] ERROR - Debugger process Process Cleanup error
System.ComponentModel.Win32Exception (0x80004005): Access is denied
   at System.Diagnostics.Process.Kill()
   at HP.Utt.Debugger.UttStandaloneDebuggerProcessManager.Cleanup() in e:\LT\UTT\win32_release\12.0.776.2\src\Infra\app\UttDebugger\UttStandaloneDebuggerProcessManager.cs:line 286
2015-03-19 11:07:10,799 DBG           [ 31] ERROR - Debugger Cleanup command error while closing Debugger Callback Context
System.TimeoutException: Close process timed out waiting for service dispatch to complete.
   at System.ServiceModel.ServiceChannelManager.CloseInput(TimeSpan timeout)
   at System.ServiceModel.ServiceChannelManager.OnClose(TimeSpan timeout)
   at System.ServiceModel.Channels.LifetimeManager.Close(TimeSpan timeout)
   at System.ServiceModel.InstanceContext.OnClose(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Close(TimeSpan timeout)
   at HP.Utt.Debugger.UttDebuggerImp.Cleanup() in e:\LT\UTT\win32_release\12.0.776.2\src\Infra\app\UttDebugger\UttDebuggerImp.cs:line 287

We are unable to replay any NFuse script because of this issue. Any help would be highly appreciated!! Below are the details-

Citrix XenApp 6.5 over Win Server 2k8 R2

Citrix Receiver 3.4.0.29577

Vugen 12.0.1362.0

Microsoft DEP fully disabled