Laurie Savage schrieb:
I am trying to use SIunits in the book layout. I get an error message "square already defined". Am I doing anything wrong. I have a 'plain vanilla' preamble which only includes\usepackage{SIunits}
the problem must be elsewhere in the doc. cretae a new doc with book layout and insert \usepackage{SIunits} in the preamble. no copy and paste some parts from your doc into this new one and try to run dvi-view. Herbert -- http://www.educat.hu-berlin.de/~voss/lyx/