how create stock transfer reservation in apo

Hi Gurus,

I need your help, we need to know how to create stock transfer reservation with type category BC or BD ??

we are testing some bapis with out any result.

   Using this

        BAPI_POSRVAPS_CREATESNPORDER

  The system send a messge

        E APO_BAPI             110 Catagory BC is not defined for catagory type 1 or R/3 object

  Any suggestions.

  Noemí Huerta