Procurement exceptions happen in the following conditions:

1. No bill of materials defined for production: in this case you have got to create a BoM or indicate that the product can be purchased instead (change the Supply Method).
2. No supplier available for a purchase: you have to define a supplier in the Supplier tab of the product form.
3. No address defined on the supplier partner: you have to complete an address for the supplier for the product in consideration.
4. Not enough stock: you have to create a rule for automatic procurement (for example, a minimum stock rule), or manually procure it.

Note: The default address for the supplier must be defined. If this is not set but invoice/delivery addresses are set, the scheduler will not create the RFQ.

1- Make sure you did a Buy route as below :

2- don't forget to assign it to the product or the product category