BPC 10.0 - Using Script Logic - How can I update a record with it's old value plus new value?

Dear All,

In BPC 10.0, using script logic, I am trying t update a record in a cube with a value : 200. Assume that it contains an old value of 150. When I update with REC statement, a record is inserted with a value of 50. This is the normal behavior.

If I want to update the record with the accumulated value, how can I do that using script logic? i.e. to update a record with old plus new value, in this case, it is 350, how can I achieve that?

Thank you.

Regards,

Peri