Hi,
I just Create a Customer and add it a Delivery Address, I enter a wrong Contry Code, I tried to change it but indicates "Address code in use, country cannot be changed".

There is no Sales Orders header or line with this Delivery Address, how can I change the Country on this Delivery Address

Thanks!

check if you have linked the delivery address in customer master?

Hi,
In Maintain Customers (tccom1101m000) the fields for Postal Address and Delivery Address are empty.

Hi,

use the session "print reference to parent (ttaad4229m000)" to find out where your address code is still being used. Enter "tccom130" and your address code on the session form.
Note: even if you change sales header and lines the address code still remains in sales history tables!

You can change country code through GTM

Data is on History tables, that's why it cannot be modified.
Thanks!