On Wed, Jan 11, 2012 at 1:22 PM, Steffen Wolfrum <context@st.estfiles.de>wrote:

> Hi,
>
> testing the current beta gave me several errors and "Undefined control
> sequence",
>
> for example \showframe
> (must not be used before \starttext anymore?}
>

It's a matter of font still not defined at that point: just pickup a body
font
\setupbodyfont[lmroman]
\showframe
\starttext
\input knuth\par
\stoptext

-- 
luigi