Hi Richard,
I tried your sample question, and it works perfectly—thank you very much! However, I’m still encountering a challenge, and I’m unsure whether the issue lies with the Prolog environment or the Prolog question template.
The facts below work okey:
parent(john, mary).
parent(john, tom).
When i add a third fact as shown below, i get an error:
parent(john, mary).
parent(john, tom).
parent(susan, mary).
An error appears on the first fact:
I tried your sample question, and it works perfectly—thank you very much! However, I’m still encountering a challenge, and I’m unsure whether the issue lies with the Prolog environment or the Prolog question template.
The facts below work okey:
parent(john, mary).
parent(john, tom).
When i add a third fact as shown below, i get an error:
parent(john, mary).
parent(john, tom).
parent(susan, mary).
An error appears on the first fact:
***Run error*** ERROR: Type error: `character_code' expected, found `-1' (an integer) ERROR: In: ERROR: [11] char_code(_9694,-1) ERROR: [10] '$in_reply'(-1,'?h') at /usr/lib/swi-prolog/boot/init.pl:1012As shown below:
Where could the problem be???