Getting NERO_BURN_USER_ABORT in the OnDoneBurn event, but user didn't abort


I am developing a commercial application that has Nero integrated in it for archiving purposes. On a new system that is currently being installed and tested for delivery, I have a strange error during archiving. Burning fails, and I receive an OnDoneBurn event with status code NERO_BURN_USER_ABORT, although I did not abort anything.
Archiving works fine on my development system.

I saw in another post that the NERO_BURN_USER_ABORT status code can be fired under some circumstances, even when the user did not request abort.

Could you please tell me under which circumstances (other than a ‘real’ user abort) this status code is returned.

Thanks for helping,