I’m talking about ART. I just mentioned RT since it has the same strange behaviour, with some builds working well with files from Barracuda Dual ISO and some other builds not.
ART is :
Version: 1.12.1
Branch: master
Commit: 8262aa635f13
DNGs from Topaz are now OK, following your suggestion. Thank you.
With Barracuda Dual ISO, this is what I obtain. A magenta image:
Myabe something in my .arp? I think I did not do any change. It is, or almost is, the default ART profile.
https://www.sparapaunz.com/IMG_5047_Barracuda_Dual_ISO.DNG.zip