Hi VIGNESH BALAJI
It could be a problem related with the drivers, as long as you are using windows 10, you need to actualize your drivers, please install Windows USB drivers: http://www.pemicro.com/opensda/.
Another option could be a debug process that remains active, please check this post: https://mcuoneclipse.com/2014/11/03/debugging-failure-check-list-and-hints/ it said how to kill this processes in section 9.
Hope this could help
Best regards
Jorge Alcala
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