I am using PEGA Robotics version 8.0.1106.0 plugin in Visual Studio 2015.

I am facing the below error while executing an automation that uses Excel application.

Please suggest for the resolution.

1) Exception Information
*********************************************
Exception Type: OpenSpan.Automation.AutomationException
EventLink: OpenSpan.Automation.EventLink
ThrowingLink: OpenSpan.Automation.EventLink
MachineName: "XS11-1EERM5A"
CreatedDateTime: 10/9/2018 9:24:42 PM
AppDomainName: "OpenSpan.Runtime.exe"
ThreadIdentityName: ""
WindowsIdentityName: "NESTLE\NBSahaVi"
AdditionalInformation: NameValueCollection with 0 items
Message: "Error executing link in Automation: EL_F_Worksheet_GetByName - From: GlobalContainer.excelTest.Properties To: EL_F_Worksheet_GetByName._Workbook.Properties

GetWorkingInstance() could not get instance from TypeProxy. InstanceName: _Workbook"
Data: IDictionary (System.Collections.ListDictionaryInternal) with 0 items
TargetSite: Void Execute(System.Object, OpenSpan.Automation.ExecutionEventArgs)
HelpLink: NULL
Source: "OpenSpan.Automation"
HResult: -2146232832

StackTrace Information
*********************************************
at OpenSpan.Automation.EventLink.Execute(Object sender, ExecutionEventArgs e)
at OpenSpan.Automation.EventLink.OnReceiveEvent(Object sender, ExecutionEventArgs e)
at OpenSpan.Automation.ConnectableWorker.DoWork(Object sender, ExecutionEventArgs executionArgs)

2) Exception Information
*********************************************
Exception Type: System.NullReferenceException
Message: "GetWorkingInstance() could not get instance from TypeProxy. InstanceName: _Workbook"
Data: IDictionary (System.Collections.ListDictionaryInternal) with 0 items
TargetSite: System.Object GetWorkingInstance(OpenSpan.Automation.ConnectableHost, OpenSpan.Automation.ExecutionEventArgs)
HelpLink: NULL
Source: "OpenSpan.Automation"
HResult: -2147467261

StackTrace Information
*********************************************
at OpenSpan.Automation.ConnectableHost.GetWorkingInstance(ConnectableHost connectableHost, ExecutionEventArgs executionArgs)
at OpenSpan.Automation.ConnectableWorker.DoWork(Object sender, ExecutionEventArgs executionArgs)