Why can LaTeX process the output files?
There are two options for producing LaTeX output, ‘-latex’ and ‘-latex2e’. These refer to two different versions of the LaTeX program. The first is for use with LaTeX version 2.0.9, the second for use with LaTeX version 2e. The file cxref.tex (or basename.tex if ‘-Nbasename’ is used) is the file that must be processed by LaTeX.