[texworks] ! LaTeX Error: LaTeX2e command \usepackage in LaTeX 2.09 document.

Joseph Wright joseph.wright at morningstar2.co.uk
Sat Oct 27 15:33:09 CEST 2012

On 27/10/2012 01:45, Phillip Feldman wrote:
> I find that I'm unable to use amstex; if I include the
> command*\usepackage{amstex}
> *in my document, I get the following error message:
> *! LaTeX Error: LaTeX2e command \usepackage in LaTeX 2.09 document.*
> Any suggestions will be appreciated.
> Phillip

Most likely your document starts

  \documentstyle ...

which is LaTeX2.09 syntax. LaTeX2e was released in 1994: there is really
very little reason to be creating new documents using the older format.
Use \documentclass ... instead.
Joseph Wright

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