> > ok that's the right way. Do you know where I can find documentation > about it ? Hi There is the main web site: http://modules.sourceforge.net/ Or, maybe the best way, it's to start from the modules provided by OSCAR, and change to your needs. In my case, we use Bright (former ClusterVisionOS), the module files are at "/cm/shared/modulefiles". They are TCL scripts: -sh-3.2$ pwd /cm/shared/modulefiles/gcc -sh-3.2$ -sh-3.2$ -sh-3.2$ ls 4.3.4 -sh-3.2$ -sh-3.2$ more 4.3.4 #%Module -*- tcl -*- ## ## modulefile ## proc ModulesHelp { } { puts stderr "\tAdds GNU Cross Compilers to your environment variables," } module-whatis "adds GNU Cross Compilers to your environment variables" set root /cm/shared/apps/gcc/4.3.4 prepend-path PATH $root/bin prepend-path LD_LIBRARY_PATH $root/lib:$root/lib64 -sh-3.2$ -sh-3.2$ Regards mg.