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From: "Ken Turner" <kjt@cs.stir.ac.uk>
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Subject: RE: Cygwin 3.1.X Fatal Errors - add_item ("\??\C:", "/", ...) failed, errno 22
Date: Tue, 14 Jan 2020 11:09:43 -0000
Message-ID: <000001d5cacb$1ff83630$5fe8a290$@cs.stir.ac.uk>
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Thanks to Marco for the advice, and special thanks to Henri for additional support.

As noted on https://cygwin.com/ml/cygwin/2020-01/msg00129.html, my problem was due to installing Cygwin in the drive root. I was forced to do this some years ago because of a third-party package that required Cygwin to be installed there.

Following a suggestion from Henri, I moved C:\bin, etc. to C:\Cygwin and then ran setup with the latter as the installation directory. I could then apply the 3.1.X update without problems.


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