Hi Mohan,
There is a difference between blank and zero.
BPC behavior can be explained as below. Consider a particular intersection of dimensions.
a. If that intersection does not exist in the backend BPC excel will show blank (if suppress zero is not opted)
b. If that intersection has more than one record and sum of the records is zero then BPC excel will show zero (if suppress zero is not opted.
Deleting can be done in multiple ways.
1. If you are clearing data from back end (go to RSA1, Set planning not allowed, go to Deletion Selection and select the dimension values which need to be deleted) then the intersection will get cleared. This is the case of (a) explained above
2. If you use excel to delete you will have to enter 0 in the input template where you want to delete. Then backend will create an opposite sign entry. This is case (b) explained above
In the excel if you hit DELETE, the excel shows blank. Blank cannot be sent to server and then you will get an error 'there is no data to refresh'. You need to enter 0 rather than delete in the front end if you want to clear a value of an intersection.
Hope this helps
Udath