Why are item, quantity, unit of measure, and unit price attributes not populated on item-based project contract invoice lines?

The attributes are not populated on the item-based project contract invoice line because the Item or Item Description invoice line grouping attributes haven't been added to the event invoice format.

To populate the attributes:

1. Set up a new event invoice format, or update an existing one.
2. In the Setup and Maintenance work area, use the Manage Invoice Formats task to add Item or Item Description as invoice line grouping attributes to the invoice format.
3. Associate the new event invoice format with the bill plan linked to the project contract line.
4. Enter item-based billing events for the project contract and its associated contract line.
5. Run the Generate Invoices scheduled process for the project contract, and review the invoice lines on the draft project contract invoice.