Hi Monalisa,
Compression in cubes compresses only several records with exactly the same char values into one record (which came out of several loading requests).
In your case you have to make sure, that the DSO ist creating the reverse of the original record and the new record.
The reverse of the old record plus the original old record will then be compressed in the cube into one record with value 0 - so you need to do compression with 0-deletion in the cube to get rid of those records.
regards
Cornelia