Hi Aravind,
Are you working with which version and SP level of BPC? (i.e.: CPMBPC 801 SP02)
Is your user an administrator of the environment you're maintaining?
Do you have SAP_ALL and SAP_NEW profile? (check in tx SU01)
What profiles does BPCUSER has in Netweaver? (tx SU01)
Have you followed all the post installation steps from the install guide?
(it doesn't matter you won't use some profiles or you're on QA and will transport the environment from DEV. All post installation steps are mandatory)
Regards,
Marcelo