@ -464,7 +464,7 @@ LineGraph.prototype._updateAllGroupData = function () {
if(this.itemsData._data.hasOwnProperty(itemId)){
varitem=this.itemsData._data[itemId];
if(groupsContent[item.group]===undefined){
thrownewError('Cannot find referenced group. Possible reason: items added before groups? Groups need to be added before items, as items refer to groups.')
thrownewError('Cannot find referenced group '+item.group+'. Possible reason: items added before groups? Groups need to be added before items, as items refer to groups.')