Hi,
can you replicate the data soruce form ECC to BW
come to BW side -> enter tcode - RSDS -> give the data source name -> give the soure system name ->
go to data source name -> select replicate the data source
after check the all fields are avalible at BW side
it should be all fields are avaliable in BW compare to ECC data source.
Thanks,
Phani.