Asymptote output doesn't create a new pdf file

Question

I already set everything up so that I can use Asymptote in LaTeX (specifically, pdfTeX), but for some reason, my code doesn't output.

The entire LaTeX file creates a pdf, as usual, However, the Asymptote, which should have outputted a pdf just for each drawing, doesn't create the needed pdfs. The output pdf doesn't even show the pictures, it just skips to the LaTeX right after the Asymptote code.

I'm trying to draw 8 pictures in Asymptote. The first 2 and last 2 seem fine, but the other 4 (file-3, -4, -5, -6) are messed up. Here's what the console says when trying to parse the code:

...(other stuff that I don't think is helpful)
Output written on "file.pdf".
SyncTeX written on "file.synctex.gz"
Transcript written on "file.log".
Processing file-1
file-3.asy: 17.10: no matching variable 'graph'
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019)
(preloaded format=pdflatex)
...(more stuff that I don't think is helpful)

How can I fix this? I know my code works fine, I tried it online and it seems good.

EDIT: Thanks, everyone! I solved the problem with Schrödinger's cat's solution.

Answer 1

Welcome! The error message is (IMHO) very clear: it does not recognize graph. This is because you forgot to add import graph;. In what follows I add a complete code example so that others can compile it with the -shell-escape flag, but you may only need the code between \begin{asypicture}{name=graph1} and \end{asypicture}. I also added size(200,200);, change it to whatever you find appropriate.

\documentclass[border=3mm]{standalone}
\usepackage{asypictureB}
\begin{document}
\begin{asypicture}{name=graph1}
import graph;
size(200,200);
real xmin=-2,xmax=8;
real ymin=-2,ymax=10;

real f(real x) {return 2*((2*x)-1+(x^2)+(4/((x^2)+1)^2))/3;}
real g(real x) {return ((1/2*((x-1)^(2))) - (1/10*((x-2)^(3)))+1)/2;}

path Cf4=graph(f,xmin-3,-0.2376821809755,n=100);
path Cg4=graph(g,-0.2376821809755,xmax-3,n=100);
draw(Cf4,blue);
draw(Cg4,blue);

xlimits(xmin-3,xmax-3,Crop);
ylimits(ymin-4,ymax-4,Crop);

label("min($f\left(x\right)$, $g\left(x\right)$)",(-4.5,5),W,fontsize(12));

draw((5,0)--(-5,0));
\end{asypicture}
\end{document}

Needless to say that

\documentclass[border=3mm]{standalone}
\usepackage{asymptote}
\begin{document}
\begin{asy}
import graph;
size(200,200);
real xmin=-2,xmax=8;
real ymin=-2,ymax=10;

real f(real x) {return 2*((2*x)-1+(x^2)+(4/((x^2)+1)^2))/3;}
real g(real x) {return ((1/2*((x-1)^(2))) - (1/10*((x-2)^(3)))+1)/2;}

path Cf4=graph(f,xmin-3,-0.2376821809755,n=100);
path Cg4=graph(g,-0.2376821809755,xmax-3,n=100);
draw(Cf4,blue);
draw(Cg4,blue);

xlimits(xmin-3,xmax-3,Crop);
ylimits(ymin-4,ymax-4,Crop);

label("min($f\left(x\right)$, $g\left(x\right)$)",(-4.5,5),W,fontsize(12));

draw((5,0)--(-5,0));
\end{asy}
\end{document}

also works.