To create the LaTeX format file, do
This will create a file latex.fmt. You should install this with:
mv latex.fmt $LATEXFORMATS
where $LATEXFORMATS is the path to the directory. If you had a latex binary before, it will now pick up the new format. Otherwise, you should say:
ln virtex latex
If you still are wracked with errors, perhaps you should check if installed the binary correctly. Do a
to check if the installation was perfect.