Parameter in SAP BW Query Error

Hi,

I'm trying to pass a parameter to a SAP BW query but I keep getting an error that says "The value is not a cube." Below is my query. Much appreciated if someone can help fix this.

let
  Prefix = "[0FISCPER]",
  CuurentPeriod = Text.Combine({"Z6",Param_CurrentPeriod}),
  #"GetParameterValue" = "[" & (CuurentPeriod) & "]",
  Orders = #"Fact Sales Open Orders",
   #"Added items" = Cube.Transform(Orders, 
   {
    {Cube.ApplyParameter, "[!V000001]", {"[0FISCPER]." & #"GetParameterValue"}},
    ....
   })
in
  #"Added items"