RSA3 extracting less records which are transferred to BW

Hi Experts,

I want to check the data in ecc which available in PSA of BW. The records that are transferred to BW are 1695, where as when i tried ti check the data in ecc using rsa3 with update mode d in rsa3 it throwing an error, As this is an delta Update, I checked in rsa7 Delta queue its showing 1496 records only. Why there is a difference between these 2. As I want to check the data for some records of PSA and ECC. Please provide me your ideas

Thanks,

Ravi