I can see the 0base_uom in infocube but not in transformation

Hi Guys

I am stuck with this issue, I need to map the material unit (meins) to the 0base_uom in the 0pur_c01 infocube, I can see the unit dimension in the infocube but somehow can not see it in the transformation, how do I get the 0BASE_UOM in the transformation ? am i missing something ?

Thanks

Sameer