Thanks @yeye,
The file you provided worked fine for me… there was no need to run the “Update Vuescan/Silverfast DNG” utility since there is included a direct profile for the Epson GT-X970.
(It will only work with the 48-bit RGB output set, so if you have other files which were not scanned this way in Vuescan, it will not work).
So either there is a bug with Lightroom, or the Vuescan profiles folder hasn’t been installed. In any case, make sure your profiles are installed in the right place, and try restarting Lightroom.
Here, you can see the profile loaded (automatically)
Used the LR WB tool to sample the film base…
And here’s the initial conversion.
Hmm… before using the beta enhanced profiles, you’ll need to make sure that your Vuescan workflow is set up correctly and you can get regular conversions correctly. If you haven’t already, you’ll need to follow the directions carefully to install the vuescan raw profiles, and follow the directions carefully to create 48-bit Vuescan RAW DNGs. If you get that working, then you can start trying to use the beta enhanced profiles, just make sure you have the ones installed specifically for raw scans.
-Nate