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I am trying to use the package chordbox, but the following basic example

\documentclass[11pt,a4paper]{article}
\usepackage{chordbox}

\begin{document}

\chordbox{Am}{x,0,2,2,1,0}

\end{document}

gives as output

line 6: Undefined control sequence. \chordbox{Am}{x,0,2,2,1,0}
line 6: Undefined control sequence. \chordbox{Am}{x,0,2,2,1,0}
line 6: Undefined control sequence. \chordbox{Am}{x,0,2,2,1,0}

(the error is repeated three times just as I wrote it). I am using TeXstudio 3.0.4 on Ubuntu 21.10. The package is installed on the system (checked through apt). I tried to include also the packages on which chordbox says to depend on in the manual, i.e. tikz, xifthen and xstring, but to no result. Any help would be greatly appreciated!

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  • 1
    I must say this is a good question. :) Welcome to TeX.SE!
    – Niranjan
    Commented Jul 14, 2022 at 16:10
  • There is a bug in this package at line 121 \coordinate (\n\fret) at (\n - 1, 0.5 - \fret);. Let us see how can we resolve it.
    – Niranjan
    Commented Jul 14, 2022 at 16:14
  • the package uses the loop variable \n outside the loop. Contact the author. And you shouldn't use texstudio's summary of error messages, they don't show the truth. Check always the log-file. The undefined command is \n.
    – Ulrike Fischer
    Commented Jul 14, 2022 at 16:16
  • the issue has been reported already two years ago, and there is a pull request claiming that it fixes it: github.com/sfranzen/chordbox/pull/2
    – Ulrike Fischer
    Commented Jul 14, 2022 at 16:20
  • 1
    Thank you all for the clarifications! I put the fixed .sty from the github repository indicated in the comments in the directory with my project and it works. It's an ugly hack, but luckily I needed that package just for this document. Thanks!
    – Arducode
    Commented Jul 14, 2022 at 21:18

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