'Ext.Logger' [undefined] in Phonegap using SenchaTouch for Android
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I have created my secha touch 2.0 application with google maps in that. When I try to add that  to the phonegap to make android application. I get following error: 

    TypeError: Result of expression 'Ext.Logger' [undefined] is not an object. at file:///android_asset/www/app-all.js:4


How can I fix the error?