I’ve tried to update my set of Ytria tools today and encountered an error :

To avoid this error, comment out AddInMenus= in your Notes.ini and restart your client before starting the update process. This will prevent Notes from loading scanezmulti.dll and the update will proceed without errors.

After the update change your Notes.ini to the previous settings.

Update: Ryan Hum from Ytria wrote

Hi Ulrich,

… you can simply close your Notes client (even while the Ytria Update is running), and this will ensure that any Ytria .dll files are not loaded by the Notes client. This way you do not need to change your environment (notes.ini) at all.
…

Best Regards,

Ryan