Wheres my roamer gone?

I am scripting an object to find its own way between sims. It has built in safety features so I do not get accused of littering. From one of my plots, it rises to a height of 500m then travels to its next location. On arrival, which would be another of my plots, it descends to the ground. The 500 cruise altitude should avoid any no script plots which would kill it.

I have a 15 minute timer event, which sends an IM and executes a llDie. So if it does get stuck somewhere, it would self destruct.

My problem is that one object I released has never reported back. I have no returns to my Lost & Found, no Edge of World messages, no 15 minute self-destruct, nothing.

Are there ways an object can be removed from the world without the owner knowing? Otherwise, I assume it has crashed with a script error on no-return land. Am I right in saying that I have no way of finding it, apart from a long systematic search.

(I am using llSetPos to move the object)

I believe there is a way...

If I find someone's object on my land and I choose to delete it as opposed to returning it, where does it go?

My trash?

Your trash?

or that landfill Lindens installed under Daboom?

Further thoughts:

I am doing my movements in the on_rez event. So until I reach my final destination this event script will not terminate.

Will this stop the timer event triggering? If my script is stuck in a loop, would other events still trigger?

No other event handlers will trigger while an event is running. Your movement script needs to avoid this.

Just to tie up this thread:

I got my object to IM me its position every step of the way, so I could follow its journey. I discovered it was going off world, but no error messages were given.