Hi Hans,

texmfstart is a ruby script (in scritps/context/ruby);  Normally there 
should be a copy without suffix in some bin path
  
No... I have put a copy in /usr/local/bin and texexec --pdf --mode=demo m-gnuplot works now.
depends on how you installed the lucidas's 
  
texfont --en=ec --ve=bh --co=lucida --in --ma

Renaud