Thanks for this. Sadly, this situation was on a colleague's computer (in Montreal). So, I can't debug personally with them. We'll see........ With the limited time we had (my colleague and I), we unsuccessfully ran webmapper/libmapper; however, I think it was because he did not have a compatible version of the Max externals – he had an older version. We ran out of time, together, and were unable to verify. I can say the the "source" and "destination" Devices ".0" appeared in webmapper, but no mapping connections could be drawn. Again, I think this was due to the incompatible Max externals.