I have an addin on the public drive which I need others in the company
to use. On one particular computer, when I do Tools | Add-ins |
Browse, choose the file, it prompts me for whether or not i want to
copy it locally. I press yes, then I get the following error in a
MsgBox with only an OK button:

"Unable to copy add-in to library."

When does this happen? How do i fix it? I could just copy the add-in
manually, but the point is that I care what causes the above error.