Issue with Proforma invoice (F5) when using TANN item cat

Hi,

I have an Issue with Proforma invoice (F5) when using TANN item cat (free goods). The line item that has a item cat TANN carries a net value to F5 proforma invoice, even when there is no price in the sales order. When checked, the R100 (100% discount) condition type, that is there in SO, is not copied to proforma invoice, due to which the net value is appearing in PI.

The SO uses a standard pricing procedure, and the requirement is 55 ane routine for alt. base calculation is 28 for R100 cond type.

Is this a standard SAP behaviour? How can this be resolved.

Regards,

CSS