This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015/Debian) (preloaded format=pdflatex 2015.12.28) 26 MAY 2016 17:01 entering extended mode restricted \write18 enabled. %&-line parsing enabled. **AppendixA.tex (./AppendixA.tex LaTeX2e <2015/01/01> Babel <3.9l> and hyphenation patterns for 79 languages loaded. ! Undefined control sequence. l.3 \chapter *{APPENDIX} % Main appendix title The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., `\hobx'), type `I' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined. ! LaTeX Error: Missing \begin{document}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.3 \chapter* {APPENDIX} % Main appendix title You're in trouble here. Try typing to proceed. If that doesn't work, type X to quit. Missing character: There is no * in font nullfont! 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