

Restoring A Saved Program

KEY
Once a program has been saved into a file file, the interpreter can be restored
to  this  saved  state  by  invoking  the  Prolog  system as follows when it is
initially run:

            Command: prolog file

After execution of this Emas command, the interpreter will be  in  EXACTLY  the
same  state  as  existed immediately prior to the call to save.  That is to say
execution will start at the goal immediately following the call to  save,  just
as if save had returned successfully.  If you saved the state at top-level then
you  will  be  back at top-level, but if you explicitly called save from within
your program then the execution of your program will continue.
Save states can only be restored when Prolog is initially run from Emas command
level. There is currently no way of restoring a saved state from inside Prolog.

Note  that  when  a  new version of the Prolog system is installed, all program
files saved with the old version become obsolete.  You are thus advised to rely
on source files for your programs and not on some gigantic save state.