Usage of the Write Back Pre-Process BAdi

Hi,

I tried to implement the following but without any success. It doesn't do anything and the EPM client tells that I'm not allowed to plan on nodes ...

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/f0309226-814f-2d10-61a6-ef8da29e3727?quicklink=index&…

Is this still a valid How To Paper? It was made for BPC 7.x and I implemented it on BPC 10.0

Is their a method to check it?

Thank you