# Edges do not appear using gastex and drawedge

I have a mysterious edge disappearance with the following code (using package gastex, that itself uses ps and auto-pst-pdf):

\begin{center}
\unitlength=4pt
\begin{picture}(16,19)(0,-3)\nullfont
\gasset{Nframe=n,Nw=4,Nh=4,Nmr=2,curvedepth=0}\small
\node[Nw=7](F)(0,13){$F(A)$}
\node(M)(8,0){$M$}
\node(N)(16,13){$N$}
\drawedge[ELside=r](F,M){$\varphi$}
\drawedge(F,N){$\alpha$}
\drawedge(N,M){$\gamma$}
\end{picture}
\end{center}


The labels of the edges do appear at the correct places. On other computers it seems to work, since my coauthor sent a pdf with the correct picture using the same code, so it's probably my LaTeX library (I'm using texlive), but I get no errors or warnings in the log, so I'm lost.

• Welcome to TeX.SX! If I run just latex, then I don't see the labels \phi and \gamma. However, if I convert the dvi to ps, then the labels appear. So it might be just a problem of the dvi viewer. – gernot Jan 5 '17 at 18:24
• @gernot thanks ! I forgot to say; I'm compiling with pdflatex – Denis Jan 6 '17 at 0:29

Change pdflatex compilation to LaTeX (OverLeaf) or use latex+dvips+ps2pdf as suggested here.