Hello Venkatesh Murthy B.L.,
Thank you for posting on the NI Discussion Forums. I am assuming that you are being prompted to overwrite existing data by DIAdem, as I have been in the past. If this is the case, you can disable the warning message by selecting Settings » Options » General... from the toolbar, and unchecking the box titled Warning if unsaved parameters exist under Program behavior in the General Settings tab.
Chris_G
Sr Test Engineer
Medtronic, Inc.