manim: problems with tex_to_dvi in tex_mobject.py

I had to change the commands = […] in mobject/tex_mobject.py

def tex_to_dvi(tex_file):
    result = tex_file.replace(".tex", ".dvi")
    if not os.path.exists(result):
        commands = [
            "latex", 
            "-interaction=batchmode", 
            "-halt-on-error",
            "-output-directory=" + TEX_DIR,
            tex_file,
        ]
        exit_code = os.system(" ".join(commands))
        if exit_code != 0:
            latex_output = ''
            log_file = tex_file.replace(".tex", ".log")
            if os.path.exists(log_file):
                with open(log_file, 'r') as f:
                    latex_output = f.read()
            if latex_output:
                sys.stderr.write(latex_output)
            raise Exception(
                "Latex error converting to dvi. "
                "See log output above or the log file: %s" % log_file)
    return result

def dvi_to_svg(dvi_file, regen_if_exists = False):
    """
    Converts a dvi, which potentially has multiple slides, into a 
    directory full of enumerated pngs corresponding with these slides.
    Returns a list of PIL Image objects for these images sorted as they
    where in the dvi
    """
    result = dvi_file.replace(".dvi", ".svg")
    if not os.path.exists(result):
        commands = [
            "dvisvgm",
            dvi_file,
            "-n",
            "-v",
            "0",
            "-o",
            result,
        ]
        os.system(" ".join(commands))
    return result

Two cents - ran into this today, I recommend looking at the log file as this indicates an error or missing font/package in LaTeX, not a problem with manim. Look for an error like this in the log file:

! LaTeX Error: File `dsfont.sty' not found.

Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: sty)

Enter file name: 
! Emergency stop.

In my case I had two missing tex packages to install: physics and doublestroke. I followed the install instructions here.

@nickredsox still not working for me

I did as the beginning and it didn’t work. this is my first error:

C:\Manim\manim-master>python -m manim Example_Scenes.py WriteStuff -pl Media will be written to ./media. You can change this behavior with the --media_dir flag. ‘latex’ não é reconhecido como um comando interno ou externo, um programa operável ou um arquivo em lotes.

Traceback (most recent call last): File “C:\Manim\manim-master\manimlib\extract_scene.py”, line 155, in main scene = SceneClass(**scene_kwargs) File “C:\Manim\manim-master\manimlib\scene\scene.py”, line 53, in init self.construct() File “Example_Scenes.py”, line 102, in construct tex_to_color_map={“text”: YELLOW} File “C:\Manim\manim-master\manimlib\mobject\svg\tex_mobject.py”, line 144, in init self, self.arg_separator.join(tex_strings), **kwargs File “C:\Manim\manim-master\manimlib\mobject\svg\tex_mobject.py”, line 44, in init self.template_tex_file_body File “C:\Manim\manim-master\manimlib\utils\tex_file_writing.py”, line 19, in tex_to_svg_file dvi_file = tex_to_dvi(tex_file) File “C:\Manim\manim-master\manimlib\utils\tex_file_writing.py”, line 94, in tex_to_dvi “See log output above or the log file: %s” % log_file) Exception: Latex error converting to dvi. See log output above or the log file: ./media\Tex\34b95eca9f7c5b73.log

/* The first lines says that “latex” is not recognized by the system. i tryed to substitute the code from tex_file_writing by the one in the begining of this issue and did not work. I couldn’t find any solution.*/

Two cents - ran into this today, I recommend looking at the log file as this indicates an error or missing font/package in LaTeX, not a problem with manim. Look for an error like this in the log file:

! LaTeX Error: File `dsfont.sty' not found.

Type X to quit or <RETURN> to proceed,
or enter new name. (Default extension: sty)

Enter file name: 
! Emergency stop.

In my case I had two missing tex packages to install: physics and doublestroke. I followed the install instructions here.

Thanks for your response. I’ve already fixed this by installing the recent version of miktex and then by trying to compile it with my Tex editor (Texniccenter in my case). Miktex automatically suggest the installation of any missed packages once we compile the file in Texniccenter.