Here we would like to draw your attention to WC38 transaction code in SAP. As we know it is being used in the SAP SD-POS (POS Interface in SD) component which is coming under SD module (Sales & Distribution).WC38 is a transaction code used for Number ranges, document flow in SAP.
It comes under the package WCP1.
Transaction WC38 technical data table
|Purpose||Number ranges, document flow|