Error printing pdf in OpenGeo Suite client SDK app

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I am using OpenGeo Suite 3.0.2. I created an app using Client SDK and stored the raster and vector data on postgreSQL/PostGIS.

The print tool is not working, giving error the following error:

Java.io.IOException: the byte array is not recognized imageformat.

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These are the dependencies, I included:

• @require plugins/Print.js
• @require GeoExt.ux/PrintPreview.js
• @require GeoExt/widgets/PrintMapPanel.js
• @require GeoExt/plugins/PrintProviderField.js
• @require GeoExt/plugins/PrintPageField.js
• @require OpenLayers/Control/ScaleLine.js

This is the code I included for print service:

{ ptype: "gxp_print", customParams: {outputFilename: 'DAA Map-PDF'}, printService: "/geoserver/pdf/", actionTarget: "map.tbar", showButtonText: true}

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