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

[Joseph Wright]

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