Hi Prabhakar,
Perhaps this comes a little bit late. However I had a similar problem and this fixed it.
Insert the following lines to the start routine of you transformation:
c_th_fields_inbound = i_th_fields_outbound.
c_r_selset_inbound = i_r_selset_outbound.
c_exact = rs_c_true.
The correct place is in the inverse_start_routine part:
This is the original post which helped me: