[ESS] system from emacs-ess

[Angel Lopez]

Dear all,
I am trying to call seadas (a satellite data proccessing software) from 
R using the "system" command.
I call seadas using system("seadas -em").
When I run R from the bash console it works fine but when I run R under 
emacs-ess I get the message
system("seadas -em")
sh: seadas: command not found
To install seadas I had to modify my /etc/bash.bashrc file to add the 
seadas directory to the path and to run a file seadas.env.
It seems like if that is not noticed under the shell emacs uses.
I've also tried
 > system("bash seadas -em")
bash: seadas: No such file or director
  I use Debian GNU/Linux.
Thanks,
Angel