That means there are no plugins in your $PATH directories.
If you type the command 'which afni', it will show afni in some
directory (for instance, /usr/local/abin/afni). That means you
probably want the plugins to be in the /usr/local/abin directory.
It is also possible that you simply need to add a new directory
to your $PATH (in your home .cshrc file). This is if you have a
complete set of AFNI binaries on your system, but you have to
fix your $PATH to access them.
In any case, it is probably best for you to talk to a local system
administrator about this, and just let them know.
- rick