Trying to create a condition on a BW Universe

Hi experts,

I'm trying to create a condition on a BW-Query Universe just like below:

<EXPRESSION>  IIF([0HALFYEAR1].[LEVEL01].[[20HALFYEAR1]].[Value] = 1 , [Measures].[DAAP8LRPLLYPPU417LVN5XS2Z]-[Measures].[DAAP8LRPLLXY17S9W2G13IDT7] , [Measures].[DAAP8LRPLLYPPU417LVN5XS2Z]-[Measures].[DAAP8LRPLLXY17S9W2G13IDT7]) </EXPRESSION>

i've searched a lot till get this code, but it still giving me an error when I try to execute.

Does anyone can please help me?

Thanks,

Gui Boscolo from BRZ.