Cygwin Setup says, "could not open /etc/xml/catalog for saving // add command failed". Am I safe to ignore it?

[My Name]

BTW, Cygwin Setup 64 showed me that error message at the end of
installing this set of Cygwin packages: python27, bzr, emacs-w32, aspell,
aspell-en, octave.

On Sun, Jun 21, 2020 at 11:13 PM My Name <mname989@gmail.com> wrote:

> Thank you, but I find catalog already present, as a file rather than a
> directory; so I'll hold off unless you say mkdir is really what I should do:
>
> =================
> $ cat /etc/xml/catalog
> <?xml version="1.0"?>
> <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog
> V1.0//EN" "
> http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
> <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
>   <system systemId="fonts.dtd" uri="/usr/share/xml/fontconfig/fonts.dtd"/>
> </catalog>
>
> $
> =================
>
> On Sun, Jun 21, 2020 at 10:07 PM Marco Atzeri via Cygwin <
> cygwin@cygwin.com> wrote:
>
>> On 22.06.2020 04:48, My Name via Cygwin wrote:
>> > [image: CygwinSetup64ErrorMessage-000.png]
>> >
>> > /var/log/setup:
>> >
>> > ===============================
>> > ...
>> > 2020/06/21 17:21:30 running: C:\cygwin64\bin\bash.exe --norc --noprofile
>> > "/etc/postinstall/fontconfig_dtd.sh"
>> > could not open /etc/xml/catalog for saving
>> > add command failed
>> > 2020/06/21 17:21:30 abnormal exit: exit code=2
>> > ...
>> > ===============================
>> >
>>
>> try
>>
>>    mkdir /etc/xml/catalog
>>    /etc/postinstall/fontconfig_dtd.sh
>>
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>