> Same behaviour. The command hangs in maxima (command-line-interface).
> In texmacs gives the following error
>
> Load failed for /usr/share/maxima/5.9.1/src/mactex.lisp
>
You do not need to load mactex under texmacs (it is already there)
everything's seems ok if you just comment the string ($load "mactex") to run
pdiff inside texmacs.
Valery