Hello Neeti,
Are you the first user on your system? If so, you may need manually add a role to yourself (or have your security team do this if you don't have access to SU01) for your environment from the backend.
The role should be called something like:
ZBPC_??P000003
"??" would be replaced by your environment initials. This can be found by looking in RSA1, find your environment, and the first two digits of each Model's or Dimension's Technical name would be the part you need (like /CPMB/??#####)
The role I listed above is "BPC System Administrator", this will give you access to begin setting up other users in BPC.
(You may also have to give yourself ZBPC_??U000001 which just defines yourself as a User, I wasn't the first user on my system, so I'm not 100% if this role was required in addition to the above role or not, but it doesn't hurt to give yourself this as well.)
Any further questions, please feel free to ask!
Alexander
