util.js:189 FIREBASE WARNING: Exception was thrown by user callback. TypeError: Cannot set property '_aData' of undefined
        at _Api.<anonymous> (file:///home/sanya/Documents/FFG/inventory_featurebranch/india-ffg-2018-sanisa/shramik-nari-sangh-sanisa/adminpanel-web/plugins/jquery-datatable/jquery.dataTables.js:8066:35)
        at _Api.data (file:///home/sanya/Documents/FFG/inventory_featurebranch/india-ffg-2018-sanisa/shramik-nari-sangh-sanisa/adminpanel-web/plugins/jquery-datatable/jquery.dataTables.js:7141:19)
        at file:///home/sanya/Documents/FFG/inventory_featurebranch/india-ffg-2018-sanisa/shramik-nari-sangh-sanisa/adminpanel-web/inventory/js/inventory.js:191:44
        at https://www.gstatic.com/firebasejs/4.8.1/firebase.js:20:120314
        at Object.t.exceptionGuard (https://www.gstatic.com/firebasejs/4.8.1/firebase.js:20:5424)
        at e.raise (https://www.gstatic.com/firebasejs/4.8.1/firebase.js:20:154608)
        at e.si (https://www.gstatic.com/firebasejs/4.8.1/firebase.js:20:154261)
        at e.raiseEventsForChangedPath (https://www.gstatic.com/firebasejs/4.8.1/firebase.js:20:154083)
        at e.update (https://www.gstatic.com/firebasejs/4.8.1/firebase.js:20:40282)
        at t.update (https://www.gstatic.com/firebasejs/4.8.1/firebase.js:20:46076)
    t.warn @ util.js:189
    (anonymous) @ util.js:566
    setTimeout (async)
    t.exceptionGuard @ util.js:560
    e.raise @ EventQueue.js:158
    e.si @ EventQueue.js:111
    e.raiseEventsForChangedPath @ EventQueue.js:95
    e.update @ Repo.js:321
    t.update @ Reference.js:143
    (anonymous) @ inventory.js:280
    dispatch @ jquery.min.js:3
    r.handle @ jquery.min.js:3
    util.js:567 Uncaught TypeError: Cannot set property '_aData' of undefined
        at _Api.<anonymous> (jquery.dataTables.js:8066)
        at _Api.data (jquery.dataTables.js:7141)
        at inventory.js:191
        at EventRegistration.js:169
        at Object.t.exceptionGuard (util.js:556)
        at e.raise (EventQueue.js:158)
        at e.si (EventQueue.js:111)
        at e.raiseEventsForChangedPath (EventQueue.js:95)
        at e.update (Repo.js:321)
        at t.update (Reference.js:143)

This is the js file tat is using the on change method


    inventoryRef.on('child_changed',function(snapshot) {
      var dataSet={};
      dataSet["DT_InventoryRowId"] = snapshot.key
      dataSet["DATE"] = snapshot.val().DATE;
      dataSet["CategoryCode"] = snapshot.val().CategoryCode;
      dataSet["ProductCode"] = snapshot.val().ProductCode;
      dataSet["ProductSubTypeCode"] = snapshot.val().ProductSubTypeCode;
      dataSet["NoofPackets"] = snapshot.val().NoofPackets;
      dataSet["Quantity"] = snapshot.val().Quantity;
      dataSet["Metrics"] = snapshot.val().Metrics;
      dataSet["Shelflife"] = snapshot.val().Shelflife;
      dataSet["Total"] = snapshot.val().Total;
      dataSet["BatchID"] = snapshot.val().BatchID;
      dataSet["inventory_isActive"] = snapshot.val().isActive;
      InventoryTable.row('#';+snapshot.key).data(dataSet).draw();
    });