Throws an existence error. This built-in predicate is declared as a private method and thus cannot be used as a message to an object. Calling this predicate is equivalent to the following sequence of calls:
..., context(Context), throw(error(existence_error(Thing,Culprit), Context)).
This allows the user to generate errors in the same format used by the runtime.
Modes and number of proofs¶
existence_error(@nonvar, @nonvar) - error