=> R0 = 12 (reason code)
R1 = Freeway reason code
0 = object added
1 = object removed
2 = object attributes have changed
3 = local object deleted by Freeway
R2 = object type
R3 = pointer to object name
R4 = length of object descriptor
R5 = pointer to object descriptor
R6 = IP address of device which holds or held this object.
Warns that an object has been added or changed, removed (by the holder), or
deleted (by Freeway).
This call warns controlling applications that the named object has been
added, removed or changed. It is also issued when Freeway has detected that
the information held about a locally held object is unreliable, (as a result
of possible temporary name duplication, for example) and has removed it
unilaterally. It is issued on callback, and the contents of the supplied
name and descriptor buffers are guaranteed not to change provided they are
read from within the application's UpCall handler.
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