Hello. I am an student beginning in prolog. I have some examples in 
prolog, they are DOS examples. But I have downloaded Visual Prolog 
personal edition (the examples wont work on SWI prolog, I don't know why 
however). The programs compile perfectly, but when I try to link and run 
the files I get an error saying "Fatal error 2506: Can't open file 
c:\VIP52\Lib\Dos\Init.obj". Looking into the directory, there isn't even 
a Dos directry, it is totally missing.

Can anybody help me? I think there shoul be a way to make a dumb window 
on Visual Prolog that acts as the DOS command window, but I have no idea.

Thanks in advance

PS: Another question. One of the examples uses "makewindow" operations; 
is there any (easy) way to convert this makewindow operations into 
visual windows?

Hi, Hector

> c:\VIP52\Lib\Dos\Init.obj". Looking into the directory,
> there isn't even a Dos directry, it is totally missing.

Frankly speaking, I never compile Turbo Prolog sources by Visual
Prolog. Usually I recommend to use old Turbo Prolog 3.21 compiler to
my students. But you could ask this question in the PDC forum
http://www.visual-prolog.com .

> Can anybody help me? I think there should be a way to
> make a dumb window on Visual Prolog that acts as the
> DOS command window, but I have no idea.
> PS: Another question. One of the examples uses
> "makewindow" operations; is there any (easy) way to
> convert this makewindow operations into
> visual windows?

You could use EZY Prolog
(http://www.ezy-software.com/ezyprolog/Prolog_Inference_Engine/ezy_prolog_overview.htm)
for your purposes. It supports old Turbo Prolog predicates.

Good luck,

Alexei