I have an object which is made of out of several parts. There is the root which is physically located central to all the other parts and several 20-40 prim medium sized (About 0.5~ in size) link sets, each mostly made up of small occasionaly tortured prims. The entire object fits within a rectangular box of <1.2, 0.1, 0.35>.
I am finding some strange behaviour with linking that does not seem to conform with Andrew linden's previously posted link rules ( /111/62/11883/1.html ), mainly that if the central piece is used then one part will always refuse to link to the group, throwing the error "Link failed -- pieces too far apart".
* Changing the size of the roots does not allow them to be linked.
* Drastically increasing the scale of every object does not allow them to be linked.
* Moving all the pieces on top of each other does not allow them to be linked.
* You can link every one of the attachment pieces to each other but they will refuse to link to the central piece, despite the central piece being located virtually in the middle of the object.
No single or combination of these will allow the objects to be linked, EXCEPT unlinking them all then drag selecting every prim and linking.
Edit: After further experimentation I found that removing certain prims allows the object to be linked. There does not seem to be any reason why already linked sets of prims will refuse to link and have to be altered when the same unlinked prims will link fine.