[Tex/LaTex] Package inputenc Error: Unicode character ⁡ (U+2061), in MacTex

input-encodings

My document compiles perfectly in LaTeX (Linux and Overleaf), but it takes an error in MacTeX.

I'm using \documentclass[review]{elsarticle} and I need to declare some operators:

\DeclareMathOperator*{\extr}{extr}
\DeclareMathOperator*{\owa}{OWA}
\DeclareMathOperator*{\orness}{orness}
\DeclareMathOperator*{\andness}{andness}

Then, when I use the operator \owa⁡(E_{e_{i}},W^p) =, just in MacTeX, I'm getting this error: Package inputenc Error: Unicode character ⁡ (U+2061) [ \owa⁡]

I've updated all packages with TeX Live Utility.
The \usepackage which calls inputenc may be inside elsarticle, because I didn't call it.

In .log I could find the information above, but U+2061 is not a printable character. How can I declare it with \DeclareUnicodeCharacter?
Why this is happening just in MacTeX?

Now handling font encoding TS1 ...
... processing UTF-8 mapping file for font encoding TS1

(/usr/local/texlive/2018/texmf-dist/tex/latex/base/ts1enc.dfu
File: ts1enc.dfu 2018/04/05 v1.2c UTF-8 support for inputenc

...
! Package inputenc Error: Unicode character ⁡ (U+2061)
(inputenc)                not set up for use with LaTeX.

See the inputenc package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.136   \owa⁡
              (E_{e_{i}},W^p) =
You may provide a definition with
\DeclareUnicodeCharacter

Best Answer

on line 136 of your source you have

  U+005c REVERSE SOLIDUS     &bsol; \backslash \textbackslash
  U+006f LATIN SMALL LETTER O     o
  U+0077 LATIN SMALL LETTER W     w
  U+0061 LATIN SMALL LETTER A     a
  U+2061 FUNCTION APPLICATION 
  U+0028 LEFT PARENTHESIS     &lpar; \lparen (
  U+0045 LATIN CAPITAL LETTER E     E

So if you delete everything form the ( back to \owa and then retype the \owa ( without the invisible U+2061 character before the ( then it should be fine.

Note this is unrelated to using mactex or linux etc, you may have U+2061 defined in a package in one place and not the other, it is not defined by default.

If you want to declare it rather than remove it just use

\DeclareUnicodeCharacte{2061}{}

which declares it and makes it do nothing.

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