I don't think there is a database loaded as 2024 seems to be missing the standard metric and imperial content.

try installing 2023 version.

Don't think you have the correct file as i'm not sure what is the .msi

download a trial version of fabrication cam-duct 2023 version or older

that will save the default imperial and metric databases to you pc.

The default place they will be saved is -

(c:)windows\users\public\public documents\Autodesk\Fabrication2023

now open Cadmep and you should get a pop up request to load a configuration (screenshot)

select new

now point to where the downloaded database is (as above) and highlight the version folder (screenshot)

once you highlight the version hit select at the bottom

it should now appear in the opening list to load when you open up Cadmep as mine are in the screenshot

good luck

Both 'solutions' for the problem with Fabrication 2024 have been to tell me to load Fabrication 2023. 

I might end up doing that, but that is not a solution as I understand solutions.

Its the only solution until Autodesk release the database with the 2024 version. expect this to be updated soon.

It's a very simple and easy solution to your current issue to link it to the 2023 database and downloading a trial version of cam-duct 2023 is pretty fast and easy.

did you contact Autodesk to ask as they may give you link to download it if you don't want to download the trial 2023 version?

ok so i was just looking up if Autodesk has a download and it is an .msi file

so you already have the database

just unpack it and you should be good to go 

Fabrication Products 2022 Content (autodesk.com)

The sample databases for 2024 are in your Autodesk Account.