Can’t send messages to object in same collection that is loaded again 
I wanna send messages from a script component of object in main.collection to a script component of object created factory that located in collection created collection-factory, each time collection file is loaded.
from
“main:/a_object#a_script”
to
"main:/collection0/b_object#b_script" - - (this URL is returned msg.url())
The above is that I can send messages first time when a_collection is loaded.
when a_collection is loaded again after delete other b_collection, “Instance “/collection0/b_object” could not be found” message appeares.
msg.url() returns
"main:/collection2/b_object#b_script"
how can I send messages to same component again easily? If you know other ways, plaese tell me 