Unable to add additional line to PO

Check the Buyer and Co-ordinator on the PO are the same .  Also check the PO is still open.

Linda

Building on PRODQ​ ‘s point above, a few things worth checking when a PO doesn't show up in search when you try to add a line to it:

1. Buyer / Co-ordinator mismatch — If you're logged in as a user who isn't set as the Buyer (or the Purchase Co-ordinator) on that PO, it can be excluded from your search results depending on your authority/permission set. Open the PO directly (via Purchase Order Analysis or the order number, rather than search) and check who's assigned in those fields. If it's not you, either get it reassigned or have the correct buyer add the line.
2. PO Status — Lines can only be added while the PO is still in an Open/editable state. If it's already been Released, Confirmed, or Closed, the system won't let you add lines through the normal add-line flow, and depending on your search filters it may not even surface in the list. Check the order's status directly rather than relying on the search screen.

PO is open, all the information is the same