(I replied with this earlier directly to someone who I didn't realize had
only replied to me.)

I do have a couple other clues that I've noticed while continuing to debug
this.

This person also has "git bash" installed, which is certainly similar to
Cygwin, but not quite the same.  In his gitbash shell, he does not get this
error.

If it matters, here is the "uname -a" output (hostname elided):

    CYGWIN_NT-10.0-22000 ... 3.4.6-1.x86_64 2023-02-14 13:23 UTC x86_64
Cygwin

If it matters, here is the same from his gitbash shell:

    MINGW64_NT-10.0-22000 ... 3.1.7-340.x86_64 2021-03-26 22:17 UTC x86_64
Msys

He is running Windows 11 (as I am).

What else can I try to narrow this down?

On Tue, Jun 13, 2023 at 2:54 PM David Karr <davidmichaelkarr@gmail.com>
wrote:

> I have been using Cygwin for many years, although I wouldn't call myself
> an advanced user.
>
> I'm working with some much newer users.  They set up Cygwin, but I didn't
> see them do it. I ran "uname -a" and it was about the same as mine.  I
> compared the output of "env|sort" and I saw some differences, but I can't
> tell if they were significant.
>
> When I run the following command:
>
>     kubectl config use-context dev2ff
>
> It works perfectly fine, setting the correct context.  When this user I'm
> working with runs the same command, he gets this (replacing his userid with
> "..."):
>
>     error: FindFirstFile C:\cygwin64\home\.../.kube/config: The directory
> name is invalid.
>
> He did have "HOME=/c/Users/...", but I had him change it to "/home/...",
> but that didn't make any difference.
>
> I'm not sure what could be happening here.
>