Stock quantity KF coming as 0 from dso A to another dso B? Please suggest.

Question

We have one reserved stock quantity KF in prod where we are getting the values to 'A' DSO from the x data source in ECC through full update. I mean when ever there is a change to the quantity it will be updated to the A dso, if there is no change nothing will get into the A dso. if mat 1 has new 10 reserved quantity it wll come as 10 and then there is another DSO "B" where its pulling from A to B in delta update. In the B dso its a delta load from A to B. And the problem now is no matter if we have an update to mat 1 or not its pulling the quantity as 0 from A to B DSO. That is in clear scenario, mat 1 is coming as 10 yest which is right and if suppose there is no update to mat 1 today, DSO A has nothing in it which is also right. But B dso is having 0 in it which is wrong.....so this is happening for all the mat 1 .......mat 100 even if there is no quantity update in the DSO A.
For example if we have no update in the DSO A tomorrow, there is no record in DSO A but there is a mat 1 as 0 in DSO B tomorrow.
DSO A is a full update from ECC and DSO B is a delta upload from DSO A to DSO B. So all the  material's are coming as 0 even if there is no update in ECC for the reserved quantity in BI. Please suggest me any approach to fix the issue.
My requirement is mat 1 should have 10 in DSO B even today even if there is no delta update. That is it should not replace the earlier/previous reserved quantity to 0 if there is no delta change.
NOTE: If there is any delta update to DSO A -50 after a couple of days, it shows the correct quantity in DSO A as 50 and DSO B as well. But will show the reserved quantity as 0 between the old (10) and new (50) delta loads.
dso B has these values
mat 1- 10 - yesterday
mat 1- 0 -today
mat 1- 0 -next day
mat 1- 50 -after couple of days
dso A has only these
mat 1- 10 -yesterday
mat 1- 50 -after couple of days
requirement in DSO B
mat 1- 10 - yesterday 
mat 1- 10 ( since no change) - today
mat 1-  10 (since no change) - next day
mat 1 - 50 ( as new delta has come) - after couple of days
Edited by: Daniel on Mar 29, 2011 1:45 PM

Answer 1

Hi Daniel,
In Transformation between DSO A-->B, for KF reserved stock quantity the values are in Overwrite.
to check right click on the mapping of KF open Rule Details --> see Aggregation(it will be overwrite).
As per your requirement you can't change to summation also.
So i guess you have to go for ABAP code:
In Rule details set rule type to Routine and write use below code:
(suppose your source field is R_S_QTY)
declare an temp variable is global area.
IF R_S_QTY > '0'.
RESULT= SOURCE-FIELD->R_S_QTY.
Temp_var = RESULT.
ELSE.
RESULT = Temp_var.
ENDIF.
Hope these might resove your issue.
Thanks,
Jitender.