If I behind customer tick "do not send as e-invoice" it`s ok to save, but
otherwise I get inkorrekt Bank... I also double checked IBAN and could not find
anything wrong...
This is not the issue of upgrade SERP. But serverip.dat in this case contains the value: 192.168.88.12:1301, so this is local IP of the server with SERP.
Anyway I don't understand what do you me...
