conflict between lineno and amsmath packages in TeXLive 2022? Some environments (like \gather) are already defined

[Christopher W. Ryan]

Thanks for the link.  Unfortunately, even when I hack the publisher's
.sty file to change the loading order, the problem still occurs with my
manuscript.

The publisher provides a template.tex file. With my correction made to
the publisher's .sty file, it seems to compile--as long as it sits in my
C:\texlive\texmf-local\tex\latex\this_publisher directory.  If I move it
to the directory where I store all my documents, on my E:\drive, the
error again occurs.

--Chris Ryan

Ulrike Fischer wrote:
> Am Thu, 5 Jan 2023 12:43:27 -0500 schrieb Christopher W. Ryan via
> texhax:
> 
>>
>> I'm now encountering significant problems compiling a manuscript with a
>> journal publisher's template. The template loads a *ton* of packages and
>> seems rather complex, at least to me.  Based on some investigation
>> online, I believe the problem stems from the sequence of loading the
>> amsmath and lineno packages. The publisher's template loads lineno first.
>>
>> For simplicity, below is a MWE that reproduces the error message I get.
>> As written, it compiles properly. But switch the order of the two
>> packages and I get this error:
>>
>> ERROR: LaTeX Error: Command \gather already defined.
> 
> That is known 
> 
> https://github.com/latex-lineno/lineno/issues/5
> 
> It will hopefully be resolved in the near future but for now you
> will have to ensure the right loading order.
> 
> 
>