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Getting this error while trying to upload my paper to the Springer journal.

But it builds fine on my system.

Any help?

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  • @moewe tod: Is it U+2016 or U+2061? The tex error should indicate a line number. Do you have anything strange on that line? Some symbol you copy and pasted?
    – Teepeemm
    Apr 11, 2019 at 15:59
  • @Teepeemm it is U+2061
    – tod
    Apr 11, 2019 at 16:01
  • U+2061 is FUNCTION APPLICATION that is an invisible zero width character intended to distinguish concatenation meaning function application from concatenation meaning multiplication,. You should be able to simply delete it. Apr 11, 2019 at 16:06
  • @DavidCarlisle How can i delete it? I am using Winedt
    – tod
    Apr 11, 2019 at 16:16
  • just delete the line and retype that line for example, the full error message from the log shows you where the character is. Apr 11, 2019 at 16:16

2 Answers 2

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U+2061 is FUNCTION APPLICATION that is an invisible zero width character intended to distinguish concatenation meaning function application from concatenation meaning multiplication,. You should be able to simply delete it.

If deleting it is hard then declare it to do nothing add this to the document preamble

\DeclareUnicodeCharacter{2061}{}
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  • David "The Hammer!" Carlisle, (+1) Apr 11, 2019 at 16:10
  • @StevenB.Segletes can you suggest a better tex definition for a character defined to have no effect on visual output? :-) Apr 11, 2019 at 16:11
  • I stand in full admiration. Apr 11, 2019 at 16:12
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    Would it be possible to do something like \DeclareUnicodeCharacter{2061}{X}, so that the output would show where the offending character is hiding?
    – Teepeemm
    Apr 11, 2019 at 17:45
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    @Teepeemm , yeah this works too. You could place any character in the brackets.
    – Doesbaddel
    Apr 11, 2019 at 17:52
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If there is a part of the text where you think invisible U2061 is hidden then you can copy and paste it to Microsoft Word using "Keep Text Only" option and the hidden symbols will be visible. You can delete them and then copy paste the edited text back into TeX.

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