CopyFile Error 70 [Excel 2010, VBA Only]

I am attempting to create an install file.

There are some users using Outlook 2003 and others using Outlook 2010. The macro ensures the msoutl.olb is installed for both versions. But I can't get the CopyFile Command to work without erroring out.

All paths are correct and I have admin rights to all files/folders...

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Thread bump

I was getting the same error (70). I read that someone solved it using the FSO, create object, etc...
It didn't work for me.

I altered the function as follows but I am getting Error 448 Named Argument Not Found

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Removed the

overwrite:=True

still getting Error 70

I did that. It turns out that I was still using the file (outlook library in an Addin). I disabled the Addin and it worked perfectly. Thank you.