Hi Heikel

This might not be as you have your system set up, but it might help

If your subscriptions are set up as follows

Customers --< Subscriptions --< SubscriptionLines >-- Products

and your orders are set up like this

Customers --< Orders --< OrderLines >-- Products

Then a new order based on a subscription can be made from a button in Subscriptions like this

let a := this;
let b := (create Orders);
b.Customers := a.Customers;
b.Subscriptions := a; <-- optional line here!
for c in SubscriptionLines do
    let d := (create OrderLines)
    d.Orders := b;
    d.Products := c.Products
end

You will need to include dates, prices, etc but this should get you going.

Regards John