Error in Billing Document Creation

Hi All,

I have searched many SCN threads and did not found suitable solution, so I am placing my issue here.

I am Facing one issue while creating billing document w.r.t. Sales order. As our business process does not have Delivery. so we are using the Order related billing process only by copying cash sales document type 'CS'/'BV' and item cat is copied from TAD and maintained copy controls from BV to TAD. We did not mapped the SH (WE) partner function in PDP configuration. but system is displaying the error as below.

Please help me.

Thanks

Srikanth