Figures not publishing to PDF, snapnow throwing errors

My code yeilds the result I want on screen, but I'm not getting any of the figures in the published PDF file. I tried using "snapnow", but it's just giving me a bizarre error that I can't make out.

This code:

function homework_5()
    plot_transfer(1);
    plot_transfer(10);
    plot_transfer(100);
end

function plot_transfer(k)
    T = get_transfer(k);
    [u,t] = get_ramp();
    name = sprintf('k=%d',k);
    figure('Name',name,'NumberTitle','off');
    lsim(T,u,t);
    snapnow;
end

function transfer = get_transfer(k)
    transfer = tf([k],[1 1 0]);
end

function [u,t] = get_ramp()
    u = (0:.01:1)';
    t = u;
end

Yeilds 3 instances of this pile of errors:

Error in snapnow (line 152)
            iCell = cellStack(end);

Error in homework_5>plot_transfer (line 15)
    snapnow;

Error in homework_5 (line 6)
    plot_transfer(100);

Error in evalmxdom>instrumentAndRun (line 109)
text = evalc(evalstr);

Error in evalmxdom (line 21)
[data,text,laste] = instrumentAndRun(file,cellBoundaries,imageDir,imagePrefix,options);

Error in publish

Error in mdbpublish (line 55)
outputPath = publish(file, options);

Anyone know what's going on?

[John Doe]

Why do you need snapnow if you're already using publish?

[Ivory Sarceno]

For some reason the figures are not showing in the published file.