"Class Not Registered" after switching from 32-bit to 64-bit LabVIEW.

I recently upgraded LabVIEW 2012 from 32-bit to 64-bit. Now I'm getting an error that says "Class not Registered". It still works just fine with the 32-bit version.

Thank you Nathan and Sunshine. The problem is I didn't build the program - it came with the instrument. As far as I can tell this is what's going on: The vi's are replete with these activeX objects - all communication with the instruments is done through invoke and property nodes. After switching to 64-bit the very first sub vi has an error at the very first command (Err (-2147221164)). It's a reference (seemingly to a class but I actually have no idea what that means) passed to the "Open Automation Function". I'll attach a screen shot for the sake of overkill.
Attachments:
labviewerror.png ‏20 KB

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Solved!
Go to Solution.
Attachments:
excel_vi.JPG ‏79 KB

I'm using excel 2003 with labview 2009 v9.0f2. I have attached the VI here. Basically, Im just using the"excel get all data.vi" to read an excel file to create an array and that's where the error occurs.
Max
Message Edited by MaxXx on 12-07-2009 10:33 AM
Attachments:
Excel Get All Data.vi ‏26 KB
Excel Get Data Specified Field.llb ‏209 KB

I Get an error every time I try to update Windows 8.1 or update Defender (EXE On top "Class not Registered")

I think my lap top has a lot more problems, then the sun has Hot spots! :)
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I went right to 8 through a new lap top. Then I got Windows 8.1 (that was about a month ago)
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"Class Not Registered​" after switching from 32-bit to 64-bit LabVIEW.

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