Thank you for the error message. This helps.
So drag/drop should work, but the script aborts because of an unlabeled aeon item.
This means, your project is missing something I took for granted when I wrote the program.
I will try to handle this error, but you may also want to take a close look at your Aeon project. Has every item (event, character, and so on) a name?
Please tell me whether converting the “Murder on the Orient express” example works for you.
Cheers,
Peter
Update:
Now the fixed version is available for download on the aeon3obsidian home page.
Please give me a short feedback if it works now for you.
P.S.
In the meantime, I managed to modify my test data so that the reported error is reproducible on my PC. aeon3obsidian.py version 1.0.5 also handles relationships that reference items with an invalid label.