I have an scripted object which rezzes a tranport vehicle. The object is on land deeded to group A. The land has permissions blocking builds except for the group A. The scripted object is rezzed on the land by an owner with appropriate permissions and is assigned to group B. Now the owner or user in Group B can touch the object and get a transport vechicle to rezz. (The script checks for isOwner or sameGroup). This all works wonderfully until the object owner logs out of SL. At this stage the script silently fails to Rez the transport vehicle object. Debug trace confirms the call to llRezObject is made, but nothing happens and there is no debug channel or other notification. If the owner logs back into SL things go back to normal.