! Emergency stop.
<*> ...ljfour; mag:=1; nonstopmode; input nullfont
Transcript written on mfput.log.
grep: nullfont.log: No such file or directory
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; nonstopmode; input nullfont' failed to make nullfont.tfm.
! Font \OT1/ptm/b/it/7=nullfont not loadable: Metric (TFM) file not found. \@IEEEtunefonts
Well, it turns out I'm not the only person to see this problem. If you also see this issue, all you need to do is:
sudo apt-get install texlive-fonts-recommended
which will install the necessary font package. Awesome!
Source
UPDATE
So, apparently not having texlive-fonts-recommended can also cause this error:
! I can't find file `ptmr7t'.
<*> ...:=ljfour; mag:=1; nonstopmode; input ptmr7t
Please type another input file name
! Emergency stop.
<*> ...:=ljfour; mag:=1; nonstopmode; input ptmr7t
Transcript written on mfput.log.
grep: ptmr7t.log: No such file or directory
I discovered this after upgrading to Precise, and having to reinstall a bunch of packages (this one included.) Hope it helps!