Lately, I've come across this problem in the GECK. I can create notes or holotapes without any problems, but when it comes to add them in a cell it won't appear in the rendering list. The same problem would also affect vanilla notes as well. I've tried to re-install the GECK and everything, but it didn't solve my problem. This situation is getting a bit annoying. I've assumed that it was a bug caused by the latest GECK update, but no one seems to have reported such a problem so far. I would think that it has something to do with the preferences INI files and if it's the case, I'd like to know how to fix that. Can somebody help me?
do they show up in the cell view window after you drop them into the render window? if so, have you tried selecting them there?
p.s.: sometimes it also helps to not select stuff by clicking but by dragging a selection box around it