Trouble with \usemodule[tikz]

["M.guravage" <m.guravage@pragma-cts.com>]

I recently experienced problems with TikZ after upgrading from ConTeXt -
2007.01.23 to 2007.03.19. Instead of looking at the differences between
the two releases, I moved my original minimal ConTeXt distribution out of
the way and re-installed the latest justtext.zip and linuxtex.zip. To this
I added my own texmf-project tree which contains TikZ, and remade the
formats.

TeX stops at the first TikZ command complaining that it cannot find the
tikz module:

  system : module tikz not found
  ! Undefined control sequence.
  l.6   \starttikzpicture

I have checked the obvious like the TEXMFPROJECT environment variable and
the ls-R files, but everything appears correct. Indeed, everything did run
correctly with ConTeXt - 2007.01.23 and pdfTeX-1.40.1.

I would be grateful if someone could suggest how I can track down this
problem?

Cheers,

Michael

PS: Here is a minimal example.

% interface=en output=pdftex
\usemodule [tikz]
\starttext
  \input tufte
  \starttikzpicture
    \draw (-1.5,0) -- (1.5,0);
    \draw (0,-1.5) -- (0,1.5);
  \stoptikzpicture
\stoptext
% finis