Google-maps – you have included the Google Maps API multiple times on this page. This may cause unexpected errors


I get two error when using google map:

  1. Warning: you have included the Google Maps API multiple times on this page. This may cause unexpected errors.
  2. a is null (main.js)

i don't know if there is any connection between the two, but the final result is that my page cannot load the map.

here is my head tag:

<script type="text/javascript" src="../s/Jquery/jquery-1.6.1.min.js"></script>
<script type="text/javascript" src="../s/jquery.placeholder.min.js"></script>
<script type="text/javascript" src="../s/index.js"></script>
<script type="text/javascript" src="../s/Jquery/ui/jquery.ui.core.js"></script>
<script type="text/javascript" src="../s/Jquery/ui/jquery.ui.widget.js"></script>

<script type="text/javascript" src="../s/Jquery/ui/jquery.ui.position.js"></script>
<script type="text/javascript" src="../s/Jquery/ui/jquery.ui.autocomplete.js"></script>
<script src="../dd/markerclusterer_compiled.js" type="text/javascript"></script><script src="../dd/dealers_js.js" type="text/javascript"></script><script type="text/javascript" src=""></script>

here is the function which i call the google map:

function set_google_map(set_region)

        var zoom;
        var center;
        switch (set_region) {
            case "usa":
                zoom = 3;
                center = new google.maps.LatLng(37.09, -95.71);
            case "europe":
                zoom = 3;
                center = new google.maps.LatLng(48.58, 7.71);
            case "east":
                zoom = 3;
                center = new google.maps.LatLng(31, 121);
                zoom = 1;
                center = new google.maps.LatLng(35, 5);
        // Creating the map  
        map = new google.maps.Map(document.getElementById('map'), options);
        google.maps.event.addListener(map, 'click', function(){
            if (infowindow) 

            //bounds = new google.maps.LatLngBounds();  

these are my variables:

var UseridEncr;
var super_category="ATE";
var infowindow;
var map;
var bounds;
var image="../dd/i/green.png";
var image_active="../dd/i/red.png";
var mc ;
var location_changed=true;
var current_region="usa";
var mcOptions = {gridSize:30, maxZoom: 8};
var last_marker;
var last_marker_z;
var DealersData ;
var markers=[];
var markers_selected=[];
var current_view=0;
var selected_items=[];
var total_selected=0;

thanks for your prompt answer.

Best Solution

I faced the same type of problem. This occurs if your web page including maps api more than one time.

I have checked in my case there was a .js file that was also calling maps api, so please first check if you are including maps api more than one time, if you are, remove the one.