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VB Express 2010 - Error with COM object

Posted on 2011-03-01
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Last Modified: 2012-05-11
I get an error when I attempt to Debug my app, the error occurs when I try to reference the COM object with this line of code:

Dim jb As New JBRequestProcessor()


The error is:

Retrieving the COM class factory for component with CLSID {0685ACEC-94F4-4828-99FB-DD2AA787E703} failed due to the following error: 800702e4 The requested operation requires elevation. (Exception from HRESULT: 0x800702E4).
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Question by:JMO9966
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4 Comments
 
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Accepted Solution

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Hairbrush earned 500 total points
ID: 35016154
I presume your application is running on either Windows Vista or Windows 7.  These operating systems come with UAC (User Account Control) which prevents certain operations being carried out by a "standard" user.  If you start VB Express 2010 by right-clicking on the icon and selecting "Run as Administrator" then the code should run fine in your debugger.

It is likely that the application you are developing may need to be run as Administrator when you have finished coding and want to run your .EXE.  The same approach can be used when the user starts the EXE.

It would be a good idea to rewrite your code as follows:

Dim jb as JBRequestProcessor
Try
     jb = New JBRequestProcessor
Catch ex as System.Runtime.InteropServices.COMException
     'handle the error, e.g. display a message box saying that the user should restart the application, running it as Administrator
End Try
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Author Comment

by:JMO9966
ID: 35043516
Thanks, I did have the com object's executable to Run As Administrator, but was still getting the error.

I ended up turning off User Control permissions and now it runs fine.  Not a long term solution but I'm good for now.
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LVL 12

Expert Comment

by:Hairbrush
ID: 35043661
Glad that's worked for you.  Please don't forget to close the question ;o)
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