Error Message: Can not create TestComplete object

I got the error from the Visual Studio error handler:

System.Exception was unhandled
Message=Can not create TestComplete object.
Source=AutomatedQA.script
StackTrace:
at AutomatedQA.script.var.GetObjectAlternative(String Name, String AlternativeName)
at AutomatedQA.TestComplete.Connect.TBaseTCClass.GetTestCompleteIntegration() in D:\Builds\TC11.3\Src\TC\ConnectedApp\dotNet\CSConnectedApp\ConnectedApps.cs:line 29
at AutomatedQA.TestComplete.Connect.IntegrationClass.Init() in D:\Builds\TC11.3\Src\TC\ConnectedApp\dotNet\CSConnectedApp\ConnectedApps.cs:line 52
at AutomatedQA.script.var.get_Item(String name, var[] args)
at AutomatedQA.TestComplete.Connect.RunTest(String LogName, String ProjectName, String SuiteName) in D:\Builds\TC11.3\Src\TC\ConnectedApp\dotNet\CSConnectedApp\ConnectedApps.cs:line 533
at Hello.Form1.button1_Click(Object sender, EventArgs e) in c:\Users\Public\Documents\TestComplete 11 Samples\Desktop\Connected Applications\Hello\C#\Form1.cs:line 109
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at Hello.Form1.Main() in c:\Users\Public\Documents\TestComplete 11 Samples\Desktop\Connected Applications\Hello\C#\Form1.cs:line 104
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:

Which folder is D:\Builds\TC11.3\Src\TC\ConnectedApp\dotNet\CSConnectedApp\ConnectedApps.cs, or where can I perhpas change where it's looking for this file? 

Thanks.

IMol