# Re: [NTG-context] "Invalid field" in Mark IV

On Wed, 13 May 2009, Flavien Lambert wrote:


In the following example, it is the ";" that leads to the error
\def\vect#1{%
\overrightarrow{#1}
}
\starttext
$({\rm O};\vect{e_{x}})$
\stoptext

If you suppress it, it works fine. (???)



Taco, the error also occurs with cambria. So, by your definition, it is an engine error.