Declare a class of object and use it in the same Class in c++

My problem is that I'm trying to declare the object Node ,declare a vector of objects Nodes and check that vector with a method of the same class, my complier(visual studio 2019) gives me "Error: Unable to open file main.obj. Error code = 0x80070002".

any suggestions to make it work as I described ?

here is my code :

class Node {

public:
    int Node_x, Node_y;
    Node(int x,int y){
        Node_x = x;
        Node_y = y;
    }

    bool is_Checked(Node point(int x, int y));
};
vector <Node> visited_Nodes; 
vector <Node> wall_Nodes;
std::vector<Node>::iterator it = visited_Nodes.begin();

bool Node::is_Checked(Node point(int x,int y)) {
    it = std::find(visited_Nodes.begin(), visited_Nodes.end(), point(Node_x, Node_y));
    if (it != visited_Nodes.end()) {
        return true;
    }
    else {
        visited_Nodes.push_back(point(Node_x, Node_y));
        return false;
    }
}

So basically I find out that I can't use find function to find an object in vector of objects (correct me if I'm wrong) so I used elements of the objects (which are unique)

  class Node {

    public:
        int Node_x, Node_y;
        Node(int x,int y){
            Node_x = x;
            Node_y = y;
        }

        bool is_Checked(Node point(int x,int y));
    };
    vector <int> visited_Nodes_x;
    vector <int> visited_Nodes_y;
    //vector <Node> wall_Nodes;
    std::vector<int>::iterator it_x = visited_Nodes_x.begin();
    std::vector<int>::iterator it_y = visited_Nodes_x.begin();

   bool Node::is_Checked(Node point(int x,int y)) {
    it_x = find(visited_Nodes_x.begin(), visited_Nodes_x.end(), point(Node_x,Node_y).Node_x);
    it_y = find(visited_Nodes_y.begin(), visited_Nodes_y.end(), point(Node_x,Node_y).Node_y);
    if (visited_Nodes_x.empty() || it_x == visited_Nodes_x.end()) {
        visited_Nodes_x.push_back(point(Node_x,Node_y).Node_x);
        return false;
    }
    else {
        return true;
    }
}