Writing all2all topology in Merlin; getting traceback from null ptr during link initialization

[Doctor-Andy]

I'm a contractor working in DOD spaces, trying to add an all2all topology to merlin.

I'm encountering a traceback error during link initialization. I've cribbed my c++ code from the mesh topology, and written a new Python configuration script. The traceback is caused by a null pointer, due to an event list being empty, but I don't see how other topologies populate the list, so I don't see what I'm doing wrong.

I did this work on an earlier version of SST on an internal DOD network, but have reproduced it on my pythonanywhere account so that I could push files onto github for review.

OS: Ubuntu 14.04
SST: version 7.2.0
openmpi: version 1.8.8

The github repository Doctor-Andy/all2all_on_sst contains all of the files I've written or changed, and a long-winded README.MD with sufficient detail to reproduce the problem, including an exact dump of the traceback.

Any help is appreciated.

Andrew D. Culhane
Sagecor Solutions

--- ASIDE: as the README.MD describes, I tried installing SST 8.0.0, and ran into entirely different problems. I'll deal with that after I get this fixed.