Unfortunately I can't seem to trigger the error now. I generated LOD multiple times, with one world selected, a few of them, and all of them. Every one was successful and (seems) to work in game. Figures, you can go looking for an error and actively try to cause it, but get nothing. If it crops up again I'll post everything with all the correct log files and event viewer info.
I did check the event viewer, and even saw the report thing come up, but when I went and looked I couldn't find it. I'll try seeing if I can get the error to happen again and report back with an event log info and the SSE log file. I was running as admin this time, forgot to mention. Apologies.
I use Mod Organizer 2, if that's important. I'm also getting an access denied error with DynDOLOD. TexGen appears to work fine. I've attached a bugreport log. I can't attach the DynDOLOD_SSE log because it's too large (at 2.7MB) but I think I got the relevant bit here.
[00:09:35.882] Creating atlas textures M:\Programs\DynDOLOD\DynDOLOD_Output\Textures\DynDOLOD\LOD\DynDOLOD_Atlas_DLC01FalmerValley.dds from 58 textures
[00:09:39.334] Error: System Error. Code: 5.
Access is denied
[00:09:39.339]
[00:09:39.339] Exception in unit userscript line 331: One or more errors occurred
[00:09:39.339]
[00:09:39.339] Check log lines above the exception for additional hints. Check the FAQ and search official forum http://forum.step-project.com/forum/101-shesons-dyndolod-support/ for those errors.
[00:09:39.339]
[00:09:39.339] If problem persists, post error report with entire contents (not just the last couple lines) of ..\DynDOLOD\bugreport.txt and ..\DynDOLOD\logs\DynDOLOD_SSE_log.txt to official forum http://forum.step-project.com/forum/101-shesons-dyndolod-support/
[00:09:39.339] Error: One or more errors occurredEdit: I noticed that bug either doesn't happen (or is avoided) if I only select Tamriel, perhaps only one world in general. bugreport.txt