Actually the post contains 2 questions

1) The following code snippets when part of the files that are minified using Sencha Cmd's
Sencha app Build - produces errors
Code:
{
            xtype : 'fieldcontainer',
            combineErrors : true,
            msgTarget : 'qtip',
            fieldLabel : 'Campaign Type',
            allowBlank : false,
            defaults : {
                    hideLabel : true,
                    width : 330
                },
            items : [{
                 xtype : 'radiogroup',
                 id : 'campaignTypeRadioGroup',
                 name : 'campaignType',
                 columns : 2,
                 vertical : true,
                 fieldLabel : 'Campaign Type',
                 layout : 'hbox',
                 items : [{
                     checked : true,
                     boxLabel : 'Ad-Hoc  ',
                     name : 'campaignType',
                     inputValue : 'N'

                 }, {
                     boxLabel : 'Re-curring',
                     inputValue : 'Y',
                     name : 'campaignType'
                 }]
            }]
        },
Code:
{
                        xtype : 'fieldcontainer',
                        combineErrors : true,
                        msgTarget : 'qtip',
                        fieldLabel : 'Campaign Type',
                         allowBlank : false,
                        defaults : {
                            hideLabel : true,
                            width : 330
                        },
                        items : [ {
                            xtype : 'radiogroup',
                            id : 'requestcampaignTypeRadioGroup',
                            name : 'campaignTypeInd',
                            vertical : true,
                            layout : 'hbox',
                            items : [{
                                boxLabel : 'Ad-hoc',
                                inputValue : 'N',
                                checked : true,
                                name : 'campaignTypeInd'
                            }, {
                                boxLabel : 'Re-curring',
                                inputValue : 'Y',
                                name : 'campaignTypeInd'
                            }]
                        }]
                }
Code:
 {
                                               xtype : 'radiogroup',
                                               width : 500,
                                               id : 'campaignTypeRadioGroupAS',
                                               fieldLabel : 'Campaign Type',
                                               labelSeparator : '',
                                               labelWidth : 130,
                                               labelAlign : 'left',
                                               vertical : true,
                                               margin : '5 5 3 5',
                                               items : [
                                                        {
                                                            boxLabel : 'Ad-Hoc',
                                                            inputValue : 'N',
                                                            name : 'campaignType'
                                                        },
                                                        {
                                                            boxLabel : 'Re-curring',
                                                            inputValue : 'Y',
                                                            name : 'campaignType'
                                                        },
                                                        {
                                                            boxLabel : 'Both',
                                                            name : 'campaignType',
                                                            checked : true,
                                                            ///Need to repalce this with the correct input value
                                                            inputValue : 'B'

                                                        } ]
                                           }
-----------------------
2) Even after removing the above snippets rendering of the viewport fails with the following message
Code:
TypeError: 'null' is not an object (evaluating 'u.dom')
Issue appears after the Viewport's initComponent has been Completed
Code:
callee is "doInsert" in the class "Ext.dom.Helper"
Called by "append" in the Ext.dom.AbstractHelper
called by "render" in the Ext.util.Renderable
called by the "constructor" in the Ext.AbstractComponent
called by the "callParent" in the "Ext.Base"
called by the "constructor" in the Ext.Component
The arguments passed on the anonymous method called by doInsert is
Code:
0: null
1: Object - cls: "x-panel x-panel-default"
id: "ext-comp-1012"
style: Object
tag: "div"
tpl: Object
     $name: "doRenderBody"
     $owner: function j() {return this.constructor.apply(this,arguments)||null;}
     $childEls: Array[1]
     $className: "Ext.layout.container.Container"
     $isClass: true
2: undefined
3: "beforeend"
4: ""
5: true
Any help would be appreciated