Shaishav,
Sadly, as you know, there is no undo related to the Drop Shipment functionality when the Post Receive takes place. I have told my customers to do the following to make a correction:
NOTE: When you create a drop shipment, upon Purchase Receipt it is auto-Ships the Sales Order linked. So in order to undo this, you do in fact have to go back to the sales order in order to undo the process, in a round-about way.
Go to the your Sales Order and Reopen the document. Insert a second Sales Lines for the Item, duplicating the item with the incorrect Shipment, and indicate it is a drop shipment as well. The key difference will be to put a negative sign in front of the quantity.
Go back to the Purchase Order and Reopen the document. Then Get the NEW Drop Shipment Sales Line from the Sales Order as a new second Purchase Line, with the negative quantity. When you receive the item this time, you will be receiving in the negative amount, and thus cancelling out the original shipment.
Hope this helps.
Thanks,
Steve
