I forgot to include some additional information that may help in analyzing my problem. First, all of my models are polyline (i.e., icicles, ridge strips, and windows). Second, I discovered an interesting phenomenon when I was testing my models directly from the xLights Test Model tab. I had one model called “Garage window” that was still in my layout that I was not using in my show. By that I mean it does not physically have anything in the field, nor is it included anywhere in the sequence. However, when I “tested” this model via the xLights Test Model tab, all of the lights that DO NOT WORK OTHERWISE that are scattered across the house in the other various polyline models, DID come on. Further, those are the only lights that came on and nothing associated with the original “Garage Window” came on.
Even though I had no idea what was going on, I thought I was on to something so I completely deleted that model. Unfortunately that had no effect on the issue and I still have the same problems with the sections not lighting up.
One last thing, I executed the “Make All Start Channels Not Overlapping” command. It changed the start channels for each of my models so I had to change those back to their correct locations. It left all of the other segments of the polyline models alone. None of this helped with the scattered sections that do not light problem.