Hi PY,
Above settings are fine. If you have any data at cube, delete and trigger your dtp. it needs to pull 1.2mlln records and will set init delta. if any new req comes to dso, that moves to cube thru next delta dtp.
if didn't worked,
Try these steps:
1. delete whole data cube if exist.
2. DSO to Cube, run full DTP
3. Do init dtp.
3a. at dtp, extraction mode: as Delta, at execute tab , processing mode: No data transfer, delta status in source; Fetched. trigger your dtp once. it enables delta to your dtp(it will green with 0 records).
3b. change your dtp processing mode to Processing mode : Serial extraction, immediately parallel processing .
4. Now load new data to your dso, next dtp between dso to cube will load latest request data only(delta).
5. if didn't work as we expected then there might be something bug at backend. need sap help.
if possible try to search for oss notes at ,market place.
Thanks