topic Testing for base map, due to error message in ArcGIS JavaScript Maps SDK Questions https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/testing-for-base-map-due-to-error-message/m-p/633398#M59162 <HTML><HEAD></HEAD><BODY><SPAN>I am receiving and error "TypeError: Cannot read property '_surface' of null "&nbsp; </SPAN><BR /><BR /><SPAN>I know that this means I must have a base map before I call for graphics.</SPAN><BR /><BR /><SPAN>But how can I test for the presence of a base map?</SPAN><BR /><BR /><SPAN>Thanks</SPAN></BODY></HTML> Fri, 15 Mar 2013 13:25:48 GMT MikeStrube 2013-03-15T13:25:48Z Testing for base map, due to error message https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/testing-for-base-map-due-to-error-message/m-p/633398#M59162 <HTML><HEAD></HEAD><BODY><SPAN>I am receiving and error "TypeError: Cannot read property '_surface' of null "&nbsp; </SPAN><BR /><BR /><SPAN>I know that this means I must have a base map before I call for graphics.</SPAN><BR /><BR /><SPAN>But how can I test for the presence of a base map?</SPAN><BR /><BR /><SPAN>Thanks</SPAN></BODY></HTML> Fri, 15 Mar 2013 13:25:48 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/testing-for-base-map-due-to-error-message/m-p/633398#M59162 MikeStrube 2013-03-15T13:25:48Z