Displaying labels including imported images seems to be problematic

[ghost]

Setup:

Windows 10 Asymptote 2.83 Ghostscript 10.0.0

---

After compiling

import geometry;
import math;

size(7cm,0);

real theta=degrees(asin(0.5/sqrt(7)));

pair B=(0,sqrt(7));
pair A=B+2sqrt(3)*dir(270-theta);
pair C=A+sqrt(21);
pair O=0;

pair Ap=extension(A,O,B,C);
pair Bp=extension(B,O,C,A);
pair Cp=extension(C,O,A,B);

perpendicular(Ap,NE,Ap--O,blue);
perpendicular(Bp,NE,Bp--C,blue);
perpendicular(Cp,NE,Cp--O,blue);

draw(A--B--C--cycle);

draw("1",A--O,-0.25*I*dir(A--O));
draw(O--Ap);
draw("$\sqrt{7}$",B--O,LeftSide);
draw(O--Bp);
draw("4",C--O);
draw(O--Cp);

dot("$O$",O,dir(B--Bp,Cp--C),red);
dot("$A$",A,dir(C--A,B--A),red);
dot("$B$",B,NW,red);
dot("$C$",C,dir(A--C,B--C),red);
dot("$A'$",Ap,dir(A--Ap),red);
dot("$B'$",Bp,dir(B--Bp),red);
dot("$C'$",Cp,dir(C--Cp),red);

Label(graphic("piicon.png","width=2.5cm, bb=0 0 147 144"),Ap,5ENE);

by

asy.exe -f pdf <file_name>.asy,

in which piicon.png may be found here, one expects the following output

But, the insertion of the last label (including the png file above), as the last line of the code intends, does not happen:

[johncbowman]

You are missing the line: settings.tex="pdflatex";

[ghost]

In addition to the absence of

settings.tex="pdflatex";

another issue was indeed Label which should be label, in the last line.

[johncbowman]

Yes, otherwise you would simply create the Label without actually applying it. The original example is posted here: orthocenter.asy