Hi PenJ
There are a few different causes for the v19 Initialisation error - it is not related to the AR2023 upgrade. If the solution indicated by Earl_HD does not solve it, there are a few other possible technical causes which usually require your IT person's involvement.
FYI you do not need to open the v19 file to upgrade to AR2023. Run AR2023 and select Upgrade from the Welcome screen, then follow the prompts to upgrade it online. A Multi currency file cannot be upgraded offline. If there are issues with the multi currency file that prevent it being upgraded online, send me a private message or email for contact details for someone who can resolve.
Regards
Gavin