Do validate if your custom route has a lower sequence than the default delivery route

Hi,

Refer to the following to set up the routes in Odoo 18.

* https://www.cybrosys.com/blog/how-to-manage-rules-and-routes-in-odoo-18-inventory

* https://www.odoo.com/documentation/18.0/applications/inventory_and_mrp/inventory/shipping_receiving/daily_operations/use_routes.html#

Hope it helps

Go to Inventory > Configuration > Routes and check your custom route configuration. Ensure that the route is correctly set up and available for the products you're working with. Also, ensure that the route is available for sales orders and that it can be selected at the line level.

you can also check Product Settings and Warehouse Setting for additional route setting that may collide with routes settings