[Bill Quayle]

Thanks, Chris for your prompt response to my query. I’ve spent the day trying to isolate the problem to a narrower field.
First, to answer your questions. Yes to both disabling the cuda renderer and deleting/cleaning the media cache. I couldn’t find how to turn on the enable logging crash feature so I couldn’t view a log report.
I tried rendering out small individual sections of the time line and thought I had narrowed the problem down to a short piece of a specific clip. That approach ended up being inconclusive. When I rendered the suspect problem area out a number of times, sometimes it worked, other times not. I also removed the entire suspect clip from the time line and rendered the shorter version. Also didn’t work.
There were no transitions or nests in the suspect area. I don’t know what lut’s do – I only know they are Look Up Tables so I can’t say if they are part of the problem. I only know I did not knowingly use/apply one.
On to what I discovered today. My project is 1920 x 1080 and I was exporting it as H.264 720p. When I exported the project as a wmv file using the HD 1080p preset, it worked. So, I tried the same 1080p preset with H.264 format and this worked as well.
It’s not the ideal situation as I wanted a smaller file, but at least it worked.
Based on this, it seems there is something wonky in the conversion process from project size to the output size/format when using 720p.
If it helps, my computer is Windows 7 Pro 64 bit, Intel i7-4770K CPU @3.50 GHz, 16 GB RAM.
If you have any further thoughts on why I can’t export to 720p, I would be grateful to hear them.
Thanks.

[Bill Quayle]

I would add that to nest the layers, it’s as simple as selecting all of them (except the adjustment layer), right click on the selected group and choose Nest. This creates a nested sequence within your timeline, and which is now shown in the Project Panel. This sequence can still be edited by opening it via the Project Panel.