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When using the Springer Nature sn-jnl.cls class file, the use of iicol mode leads to incorrect author affiliations if there are multiple affiliations. How to fix this?

MRE: open the template here, try to compile and confirm that author affiliations are correct:

Correct author affiliations

Change the \documentclass line from

\documentclass[sn-mathphys,Numbered]{sn-jnl}% Math and Physical Sciences Reference Style

to:

\documentclass[sn-mathphys,Numbered,iicol]{sn-jnl}% Math and Physical Sciences Reference Style

Compile and note author affiliations are now wrong:

enter image description here

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  • I meet the same issue. Does anyone know the solution?
    – Pengyu Zhang
    Commented Apr 1, 2023 at 9:37
  • You've found a bug, check you're using the latest version (if not maybe report the emplate as out of date to Overleaf/Springer), if it's a bug in the latest version report it to the maintainer (Springer).
    – Dai Bowen
    Commented Apr 1, 2023 at 12:07
  • @DaiBowen will do so. But I’m not sure how long they’ll take to fix it, and I have to submit a paper using this style. Hence I was wondering if someone could help debug it so I don’t have to depend on Springer’s response time.
    – swineone
    Commented Apr 1, 2023 at 13:03
  • Sure, it's fair to ask, I had a quick look, but iicol doesn't obviously change anything relevant to the issue and I don't fancy giving Springer free labour trying to debug further. It's unlikely (as the tex code is unambiguous and submissions probably solicit the metadata independently) to cause any real issue with submission though.
    – Dai Bowen
    Commented Apr 1, 2023 at 13:14

1 Answer 1

Reset to default
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I had the same problem. For me, the below works.

In sn-jnl.cls file line 501, replace

      \@for\@@affmark:=#1\do{\edef\affnum{\@ifundefined{X@\@@affmark}{1}{\jmkRef{\@@affmark}}}%

by

      \@for\@@affmark:=#1\do{\edef\affnum{\@ifundefined{X@\@@affmark}{\@@affmark}{\jmkRef{\@@affmark}}}%

Do same thing for lines 507~516.

I hope this works for you. enter image description here

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