The primitive @> is defined with the wrong name @>2.
PAIPROLOG> (?- (@> b a))
;Compiler warnings :
; In TOP-LEVEL-QUERY/0: Undefined function @>/2
; Evaluation aborted on #<CCL::UNDEFINED-FUNCTION-CALL #x30200156D49D>.
PAIPROLOG> (?- (@>2 b a))
Yes
No.
; No value
PAIPROLOG>
The primitive
@>
is defined with the wrong name@>2
.