Top "Instantiation-error" questions

An instantiation error occurs in Prolog when an argument is insufficiently instantiated.

Prolog - Arguments are not sufficiently instantiated

I am writing a little program which counts how many elements in a list are not numbers. Here is my …

prolog arguments clpfd instantiation-error
Program to generate fibonacci series in GNU Prolog is giving an instantiation error

This is my code:- fib(0,0). fib(1,1). fib(F,N) :- N>1, N1 is N-1, N2 is N-2, F …

prolog fibonacci instantiation-error
Simple prolog program. Getting error: >/2: Arguments are not sufficiently instantiated

I made a Prolog predicate posAt(List1,P,List2) that tests whether the element at position P of List1 and …

list prolog clpfd instantiation-error
Prolog Arguments are not sufficiently instantiated

I'm trying to match a subset of the facts I'm creating, and my testcase was working great! x([1,2,3,4],'bleah'). x([1,2,4],…

prolog instantiation-error