Hi Shiva
Namitra has given all correct step.
Check OD is created and GI has happen in ECC,
Then
1. Reverse GI in OD which will go in ECC and also do reversal.
2. As you want to start picking activity >>. delete OD in EWM . Nothing in ECC.
3. /scwm/cancpick which will reverse piking activity for your stock. No your HU is detached from Del is free pick as your wish/process.
Now your ODO in EWM picking status will come back to initial.
Now if you want to pick same HU then move via adhoc and pick the same HU.
If you want to repack by any combination move to repack station and do as you wish. Then you can pick.
And as you are sending in HU. If you even want to send partial or reverse partial. It means you have to reverse whole and send partial in New HU.
As Box send whole and should not reverse partial. If that is the case then such business scenario will not called as reversal it will be customer returns. In that case you are keeping box to customer place and getting some qty in warehouse back.
Please like all the post if you are ok with ans and ask next que,so all people will understand there effort makes sense to you
Thanks
Suraj