Hi L MM,
Cosidering lower level DSO = DSO1(sending data) and upper level DSO = DSO2(recieving data).
The DSO2 delta should extract only the latest records which are loaded in DSO1 that is the latest request after past successful delta request.
1. Can you check if the data is present in New data of DSO2 and is it getting merged with other data during activation? - If that is the case then it will be a DSO2 key issue.
2. Can you check if all the data is active in DSO1 before we start loading in DSO2?
3. Try using symentic keys.
In DTP you have an option of extract only last delta. Can you try that?
Let me know if I am going wrong direction in analyzing your issue.
Thanks
Amit