Hi Karthik,
The above code is present in the ITS HTML template generated for your screen. This code just displays the relevant error message on the ITS screen without going back to the SAP to dump.
Also, please see if this documents helps: http://scn.sap.com/community/its/blog/2014/11/27/the-recent-issue-with-webgui-download--sap-note-2017287
Let me know.