coq.ltac.call "apply" -> "Ltac1 tactic apply not found"

[patrick-nicodemus]

I am not experienced with Elpi so I might be misunderstanding this. But

Elpi Tactic abc. 
Elpi Accumulate lp:{{
 solve G GL :- coq.ltac.call "apply" [trm {{conj}}] G GL.
}}.

Goal forall(A  B : Prop), A /\ B.
Proof.
    intros A B.
    elpi abc.

This fails for me and prints an error of "Ltac1 tactic apply not found."
Do I need to import something special? I have imported the Prelude and the Ltac module.
rapply works.

[gares]

I should document this better: you can only call tactics defined with Ltac. Try calling myapply and add Ltac myapply x := apply x.