"AnimScriptInstance->Montage_Play" HELP

Hi, I’m trying to play an animation montage in c++ but I have an error in the code.

My code is:
Mesh->AnimScriptInstance->Montage_Play(MontageToPlay, 1.f);

But in “Mesh” i have an error that says: “Error: pointer to incomplete class type is not allowed”

What I have to do? Thanks.

Add the following header file

#include “AnimInstance.h”

hope that helps =)