dynamic directive

[bruno patin]

hi all,

I try to port some code from sicstus to gnu-prolog (I'm a beginner in prolog
I must say). And to my surprise, the first dynamic directive don't want to
work.

that is :

:- dynamic target/1, home/1, current/1.

it says me that a syntax error exists on the 12th character ?

what can be wrong ?

thanks