How do I control multigrid selection via OSC?

Question

I would like to be able to select different sounds in a multigrid track using OSC messages.  I tried setting the "Selection" field in the "Algorithmic Controls" menu of the multigrid to my OSC field (e.g. !osc_trackSelect1) and left the "Trigger field" essentially the same (e.g. !Select_Track1 hasChangedInLast: !BPM bpm s).  Using these settings, I don't get any change when I send the message.  I am able to control any other parameter in the VCS using this method, but for some reason it doesn't work with the multigrid.  

How can I change the multigrid track selection via OSC?

Answer 1

Message deleted: my answer became obsolete after correct response from SSC, see below ;-)

Thanks SSC !!!

Answer 2

Page 198 of Kyma 7 Revealed gives the protocol for controlling the MultiGrid using OSC.