In Purchase Order Preparation, on the Lines Tab, what does this message mean? “This purchase order is part of Contract (#). All updates to line and shipment quantity and date information must be made through the Contract screens”

This message appears because this PO is part of a contract (not a stand alone PO) any changes to line, shipment quantity and date must be done through Contracts:

1. Select Contracts
2. Contract Preparation
3. Prepare

Edit the PO side as needed

(The same applies to Sales Order Preparation)