Hi Thomas,
Thanks for your answer.
As you can see in my screenshots, I created the backup transport from the decom cockpit (2nd screenshot "Object List") and the status moved correctly to "Backed up". But then I had this error message when I choose "Delete Transport".
Do you have an idea about this behavior?
Is it possible to decommision/delete a backed up object directly from the decom cockpit?
Thanks and Regards.
Louise.