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