Problems asigning a member.

Hi experts.

I have this code:

*XDIM_MEMBERSET P_PLATAFORMA = <ALL>

*%PAIS_IC% = P_PLATAFORMA.PAIS

*SELECT(%PAIS_IC%,ID,P_GEOGRAFIA,[ID] = P_PLATAFORMA.PAIS)

The dimension P_PLATAFORMA has some many members and I need to identify the correspondig value for the property "PAIS". To do it I try using one of the last two sentences:

But unfortunately these don't work.

My question is how I can store in the variable PAIS_IC the content of P_PLATAFORMA_PAIS?

Thanks