Requirements planning using alternative history

[Rudy Zijp]

Hello experts,
I want to set up requirements planning for a DC using the sales history from sites which are linked to this DC.
My article has for the DC RP type R2, forecast indicator: D.
In transaction WDRD1 I enter RP type: R2, site cat: B, suplying site the DC, and my article. After pressing execute I get the follwing message:
"No RP type found for the AHD/PDF scenario"

Are there additional settings necessary in the article master.

Kind regards,
Rudy