Getting Error HRESULT E_FAIL has been returned from a call to a COM component from ViewerWorkflowActivityDispatcher

Hi,

 

Situation: Wrote custom module and invoked a custom workflow - CleanWaterTraceResults.xaml. First time it runs fine, when tried to invoke second time in same session I am getting error. It has input arguments which will be set each time it is invoked.

 

Error:

 

ERROR: Workflow 'CleanWaterTraceResults' error: System.Net.WebException: An exception occurred during a WebClient request. ---> System.Exception ---> System.Exception: Error HRESULT E_FAIL has been returned from a call to a COM component.

 

   

 

at ViewerWorkflowActivityDispatcher.HandleError(Workflow workflow, Exception error) Geocortex.EssentialsSilverlightViewer.Infrastructure.Workflow

 

   at WorkflowControllerProxystatic .HandleErrorInternal(Workflow workflow, IActivityDispatcher dispatcher, Exception error) Geocortex.Workflow.Client

 

   at WorkflowControllerProxystatic .ProcessWorkflowResults(ExecuteRestCallResult result, Workflow workflow, IActivityDispatcher dispatcher, DateTime requestTime) Geocortex.Workflow.Client

 

   at WorkflowControllerProxy+<>c__DisplayClass2.<ExecuteWorkflow>b__1(ExecuteRestCallResult result) Geocortex.Workflow.Client

 

   at RestHelperstatic .ExecuteRestCall_ProcessResults(AsyncCompletedEventArgs e, String resultString) Geocortex.Essentials.Client

 

   at RestHelperstatic .ExecuteRestCall_UploadStringCompleted(Object sender, UploadStringCompletedEventArgs e) Geocortex.Essentials.Client

 

   at WebClient.OnUploadStringCompleted(UploadStringCompletedEventArgs e) System.Net

 

   at WebClient.UploadStringOperationCompleted(Object arg) System.Net

 

   at RuntimeMethodHandlestatic .InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) System

 

   at RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) 

 

System.Reflection

 

   at Delegate.DynamicInvokeImpl(Object[] args) System

 

   at DispatcherOperation.Invoke() System.Windows.Threading

 

   at Dispatcher.Dispatch(DispatcherPriority priority) System.Windows.Threading

 

   at Dispatcher.OnInvoke(Object context) System.Windows.Threading

 

   at CallbackCookie.Invoke(Object[] args) System.Windows.Hosting

 

   at ManagedHoststatic .InvokeDelegate(IntPtr pHandle, Int32 nParamCount, ScriptParam[] pParams, ScriptParam& pResult) System.Windows.RuntimeHost

 

   Details:

 

      at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)

 

      at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClassa.<EndGetResponse>b__9(Object sendState)

 

      at System.Net.Browser.AsyncHelper.<>c__DisplayClass4.<BeginOnUI>b__0(Object sendState)

 

      --- End of inner exception stack trace ---

 

      at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)

 

      at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)

 

      at System.Net.WebClient.GetWebResponse(WebRequest request, IAsyncResult result)

 

      at System.Net.WebClient.DownloadBitsResponseCallback(IAsyncResult result)

 

      --- End of inner exception stack trace ---

 

Please help :)