Manual creation of invoices

[Alessandro]

Hello,

In my e-shop i need to manually choose wheter i want to generate an invoice for a specific order.

I tried to:
1) Create a new custom state called "emit invoice"
2) Edit the order status to the new one i just created

After i went to the orders->invoices section to generate and download the pdf for that spedicif order. But i see that the number of orders in that state is equal to zero, not allowing me to generate the pdf.

I verified in the database the following:
1) in "order_history" i have a row that says that the order is in the new state
2) in "order_invoice" there's the row about said order

Did i make any mistake? Or are there alternative ways? (without paid modules possibly)

Thanks,
Regards