This is specially for the people who purchase a vehicle in one state and register in another state. Its a very difficult and painful process and their will be many clearances to be done. like entry tax, model available in one state but not in the RTO list of another state. So your vehicle will not be registered. check your invoice model is updated in RTO master list or not. Then only they will proceed for registration.
Better buy and sell in d same state, no NOC,