\
normalsize
not definedThe font size command \normalsize is not defined: there is probably something wrong with the class file.
is reporting something pretty fundamental (document base font size not
set up). While this can, as the message implies, be due to a
broken class file, the more common cause is that you have simply
forgotten to put a \
documentclass
command in your document.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=normalszmiss