Think I've finally got the ping scanner behaving properly. Now working on UI issues. First was cleaning up the error-log view to make the error tracebacks a little more pleasantly formatted. Second is testing the node-range mapping import. It seems to be working fine still, but it's linked to network-object views being the primary focus of the UI (which is no longer the case). Need to move the management mechanisms around so that you can find the newly-imported groups in order to assign their parents properly.