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I am trying to convert a TikZ file to png following this answer to a similiar question: TikZ to non-PDF.

This is a mwe:

\documentclass[convert={density=300,size=1080x800,outext=.png}]{standalone}
\usepackage{tikz}

\begin{document}
\begin{tikzpicture}
  \draw [step=0.5] (-1.4,-1.4) grid (1.4,1.4);
\end{tikzpicture}
\end{document}

In my log file I get the following error message:

(Ext.aux)
runsystem(imgconvert -density 300 Ext.pdf -resize 1080x800 -quality 90 
Ext.png)
...executed.



 Class standalone Warning: Conversion unsuccessful!
 (standalone)              There might be something wrong with your
 (standalone)              conversation software or the file permissions!

 ) ) 

My version of the standalone package:

Document Class: standalone 2015/07/15 v1.2 Class to compile TeX sub-files stand alone

I compiled it with the following command

pdflatex -shell-escape -synctex=1 -interaction=nonstopmode Ext.tex

I installed ImageMagick-7.0.7-Q16, it is installed under: C:\Program Files\ImageMagick-7.0.7-Q16

Do I have to somehow set some path-variable? I can't find anything online where I am told that I have to set the path variable.

2

In my case I had to add the Image Magick installation directory to the PATH Variable. You can easily check with where imgconvert in the windows commandline if the imgconvert program is found in your PATH.

If the installation path of Image Magick is returned, imgconvert is callable.

Otherwise you have to modify the PATH variable. Here is a short guide for adding a directory to the PATH variable.

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