Cognos cube

[Ace]

Below is the scenario

1 . Initial load of last 3 years  -
   I am Using Framework manager Model and filter on Calendar table to load  last 3 years of Data in my first load and everything works fine.

2. last 2 periods refresh –
   After initial load I am refreshing cube for last 2 periods. I am getting double count of records during my second load for last 2 periods.
 
Cube Properties :
Time based partitioning – period level