DT 2.6.0: color matrix not found for Epson V700

Hello,
Trying to open old (2015) DNG files produced with Epson V700 scanner (using Vuescan), from BW film, I have this kind of message:
[colorin] Epson PerfectionV700' color matrix not found! [colorin] Epson PerfectionV700’ color matrix not found!
[colorin] Epson PerfectionV700' color matrix not found! [temperature] failed to read camera white balance information from PF2015-01-01.dng’!
The pictures appear like a kind of pink monochrome in DT.
I can open these files with RawTherapee, no issue (usual BW negative).

I don’t think I had such an issue with previous DT versions.
Anybody else having this issue ? Any suggestion for solving this ?

thanks !

Can you share a problem file?

Sure, here is a 6x6 scan. pl2015-09-01.dng (25.9 MB)
(one of the smallest I could find).

thanks