This worked for me, thank you Archard and all others.
I do understand a Navision logic bit better now. Last thing to do is change form to particular report, but that should be just a piece of cake.
//>>
KKFinish:=’’;
IF “Purchase Line”.Type = “Purchase Line”.Type::Item THEN BEGIN
IF Item.GET(“Purchase Line”.“No.”) THEN
KKFinish:=Item.“KK Finish”; //your field here
END;
//<<