Hi,
I upgraded from 2.7.3 to 2.8. Before, I could convert multiple CAD files to a file geodatabase in a single feature dataset but now only 1 file is finally processed.
Have you tried going back to 2.7.3 to see if it will work again? I went back to 2.7.4 and it's giving the same problem.
I was able to go back to 2.7.3 and it works again. My ESRI org administrator was able to download it I think from MyEsri. We had to uninstall ArcPro then re-install then apply the 2.7.3 patch. I don't think the 2.7's work with Portal.
Is there any movement on this? I can confirm that it still doesn't work at Pro 2.9.2. I've never been able to get the CAD to Geodatabase process working in Pro/Python 3. I've been working with tech support and they've given up trying to figure it out. Apparently the people I was working with weren't aware of this bug? We're still stuck using a Python 2 script.