Convert the stock

Hi Guru,

I have raised One PO for 100 quantity.

i did GRN 103 MVT for 100 quantity.

I did GRN 105 MVT for 80 Quantity

Now i want to make 20 quantity for Scrap from GR Receipt Block stock. how convet GR Receipt blocked stock to Scrap stock.

Thanks & Regards

Gawas