Surya,
But the thing is I am getting that alert for all the months even though there is no data in all months..I have 32 months in planning bucket...and I am having data only for 3 months.
When I suggested you look at the example Macros, it is implied that you can do this generically, not just for the specific problem you mentioned earlier.
The most recent 'problem' you have raised can be solved in several ways within Macro processing. All of these ways are illustrated in the various example Macros provided by SAP.
For example, did you look here? There are two possible approaches in this screen. There are other possibilities within the calculation itself.....
Best Regards,
DB49