When I compile this - it is only including Chapter 1 -- I get 0 Errors, 0 Warnings, and 0 Bad Boxes. The file chapter02.tex is in the same directory.
\documentclass[10pt]{memoir}
\usepackage{mathpazo}
\usepackage[margin=1in, paperwidth=6in, paperheight=9in]{geometry}
\usepackage{indentfirst}
\pagestyle{plain}
\emergencystretch=1.5em
\renewcommand*{\chapnamefont}{\normalfont\HUGE\bfseries\sffamily}
\renewcommand*{\chapnumfont}{\normalfont\HUGE\bfseries\sffamily}
\renewcommand*{\afterchapternum}{}
\renewcommand*{\printchaptertitle}[1]{}
\begin{document}
\input{Chapter1v2.tex}
\input{chapter02.tex}
\end{document}
\end{document}somewhere in the fileChapter1v2.tex? you might also consider using the\includecommand rather than\input, though that would have no bearing on your present question. – barbara beeton Nov 8 '12 at 17:31\renewcommandsto make the example even more minimal? – Ethan Bolker Nov 8 '12 at 17:32\end{document}in the chapter 1 file would be one possible cause) – David Carlisle Nov 8 '12 at 17:32