Hi Inthiyaz,
Thanks for your kind response.
But I have read on the this platform, that if you are using tcode FAGL_ACTIVATE_OP, you just need to give "Account for transfer posting" . system transfer all the balance form the existing account to this account. You don't need to transfer the balance from existing account manually.
Kindly suggest.
Regards,
Ankit K. Agarwal