Type error: Graphis is null

SK

I added a base layer with spatial reference 102100. When I try to add a point and a symbol to it, it throws an error at
map.graphics.add - graphics is null. Here is my code

var pt= new esri.geometry.Point(x,y,sr);
var sms= new esri.symbol.SimpleMarkerSymbol(...);
var label = new esri.Graphic(pt,sms);
map.graphics.add(label);

Firebug shows label holds the pt and sms values. What could be causing the issue?

StephenLead

Note that the help file for graphicsLayer says:

The graphics object is available to use after the Map.onLoad event.

So you should place your code below inside an event which runs once the map has loaded:

dojo.connect(map, "onLoad", function() {
  var pt= new esri.geometry.Point(x,y,sr);
  var sms= new esri.symbol.SimpleMarkerSymbol(...);
  var label = new esri.Graphic(pt,sms);
  map.graphics.add(label);
});