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    <p>ok... i have tes your code just by copy paste to my firebug (of course with edit the json urls),<br> and i got an error.... This is because the program flow... if it was your script, and put them in a single file, you specify a grid before the store</p> <p>here code works for me no error...</p> <pre><code>Ext.onReady(function () { Ext.create('Ext.Viewport', { layout: { type: 'border', padding: 5 }, defaults: { split: true }, items: [{ region: 'north', collapsible: false, split: true, height: 60 }, { region: 'west', collapsible: false, title: 'IZBORNIK', split: true, width: 200, layout: 'fit', items: [myTree] }, { region: 'center', layout: 'fit', border: false, items: [{ xtype: 'tabpanel', id: 'mainTabPanel' }] }] }); }); var store = Ext.create('Ext.data.TreeStore', { proxy: { type: 'ajax', url: 'myTree.json', }, reader: { type: 'ajax', root: 'nodes', record: 'leaf' } }); var myTree = Ext.create('Ext.tree.Panel', { store: store, rootVisible: false, border: false, listeners: { itemclick: function (view, record, item, index, e) { if (record.isLeaf() &amp;&amp; record.raw.tabCls) { var tabId = record.raw.tabId; var mainPanel = Ext.getCmp('mainTabPanel'); var existingTab = Ext.getCmp(tabId); if (existingTab) { mainPanel.setActiveTab(existingTab); } else { mainPanel.add(Ext.create(record.raw.tabCls, { id: tabId })).show(); } } } } }); Ext.define('app.gridStore', { extend: 'Ext.data.Model', fields: ['name', 'email', 'phone'] }); var myStore = Ext.create('Ext.data.Store', { model: 'app.gridStore', proxy: { type: 'ajax', url: '', reader: { type: 'json', root: 'items' } }, autoLoad: false }); Ext.define("app.kontakt", { extend: "Ext.panel.Panel", name: "kontakt", title: "Kontakt", layout: "border", closable: true, border: false, items: [{ region: 'north', collapsible: false, split: true, layout: "fit", height: 100, border: false, buttons: [{ text: 'Load1', handler: function () { myStore.load({ scope: this, url: 'grid.json' }); } }, { text: 'Load2', handler: function () { myStore.load({ scope: this, url: 'grid1.json' }); } }] }, { region: "center", xtype: "grid", id: "kontaktGrid", layout: "fit", store: myStore, border: false, columns: [{ header: 'name', dataIndex: 'name', flex: 1 }, { header: 'email', dataIndex: 'email', flex: 1 }, { header: 'phone', dataIndex: 'phone', flex: 1 }] }] }); </code></pre>
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    1. USEgy Mohammad Erdin
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    1. COi remove Ext.loder config, you can add it manually
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    2. COThank you so much, all i did is switched positions of Ext.require, first store then grid, and it worked!! Yes it my code, and thank you so much!
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      1. USDavor Zubak
 

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