LNK2001 error during astra::initialize()

Hi there,

I am very new here. Environment:

Visual Studio 2015

Code:

#include “stdafx.h”
#include <astra/astra.hpp>

#include
#include

int main(int argc, char** argv)
{

astra::initialize();

astra::terminate();

}

Already get error when initializing this, any clues?

Thanks so much!