@bdeelman so, I would open the developers window., ctrl-shift-i on the pi MM window
select the sources tab, navigate the left nav modules/your module name, select the source file name modulename.js
scroll to the line for the socketNotificationReceived().
this.
and click the number at the left edge of that line, should turn blue
then hit f5 to refresh the page, and MM will reload and you should stop at the line…
move your mouse over the word ‘this’, and it should expand a box describing what this points to , which should be THIS modules instance data…
if not, then THAT is the problem…