This seems to be a bug in the Import dialog. (I never use that dialog, so never noticed this!) I'm reporting to GS now...
Things do work fine though! Just via a different dialog/method:
At the top left of Navigator or (better) Organizer, press the button and then click Browse to browse to the pln file with all of your detail views. That file's views will now be visible. Just drag and drop the 3DD views onto your layout. Works fine I think?
For some reason, the drag-and-dropped views (now drawings) were set for autoupdate, but I had to select them and manually refresh them to get the contents to be visible. Not sure what that was about...perhaps related to an update problem reported in a different thread yesterday by Raul...
Cheers,
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB