Hi Subhash, Thanks for the reply. I have tried wih both AO 2.0 and AO 1.4 with SP 12, but still the error remains the same. I found in AO workbook !CP is enabled for this saved workbook. But in the AO which I am using is not enabled with Contains Pattern. Then I followed the steps similar to the thread shared earlier, but the CP is not enabled after making the settings provided in the thread. 
http://scn.sap.com/docs/DOC-55903
Thanks