# Weekly Dynamic: You are not allowed to enter a blank project and cost category

- URL: https://dynamicaccounting.net/weekly-dynamic-you-are-not-allowed-to-enter-a-blank-project-and-cost-category/
- Date: 2011-07-11
- Topics: Tips & Hidden Features, Install, Upgrade & Admin
- Type: original article

If users see the error: “You are not allowed to enter a blank project and cost category” when trying to enter a shipment invoice, there is a simple fix for this. This is a user level setting in Project Accounting so it can behave differently for different users.

The setting is controlled in Project under Setup | User. Select a user and pick Purchasing Invoice. Check Allow blank Project and Cost Category to allow invoicing without requiring a project. A similar setting is found under Purchase Order button to control P.O.’s the same way.