Hello!

I am using late binding to start PowerPoint. I have two versions of
it: PowerPoint 2003 on my development PC and 2007 at the client.
Starting PowerPoint works on both machines, but I can't run a
presentation on the other computer.
I get a COMException, when I start it:
Exception in PowerPointViewer.Start():
System.Runtime.InteropServices.COMException (0x80004005): Unspecified
error
  at
Microsoft.VisualBasic.CompilerServices.LateBinding.LateGet(Object o,
Type objType, String name, Object[] args, String[] paramnames,
Boolean[] CopyBack)
  at PowerPointViewer.Start()

I already looked at http://support.microsoft.com/kb/814912/en-us, but
it doesn't soll my problem.

<code>
Class PowerPointViewer
 Private Shared powerpointApp As Object = Nothing
 Private presentation As Object
 Private filePath as String

 Public Sub New(ByVal _filePath As String)
   filePath = _filePath
 End Sub

 Sub Start()
   If IsNothing(powerpointApp) Then
     Log("Start PowerPoint ")
     powerpointApp = CreateObject("PowerPoint.Application")
   End If

   Log("Open PowerPoint Presentation" & filePath)
   ' HERE: The COMException happens when calling Open
   presentation = powerpointApp.Presentations.Open(filePath, , ,
False)
   ' this doesn't work, too
   'presentation = powerpointApp.Presentations.Open(filePath, False,
False, False)

   ' some code ommited
   presentation.Run()
 End Sub
End Class
</code>

I am using .Net 1.1.4332 and Visual Studio 2003