Image in nested sequence does not let me export my project

Question

Hello,
Here's my issue:
In my Premiere project, I have a "Master" sequence in which I have normal a/v files and two nested sequences, for the video intro and ending.
The problem is with the nested intro sequence, which is composed of several images that I've animated, plus sound. I've narrowed the source of the problem to one specific image in this sequence, which is 5760x3240. I've read in other threads that images larger than 1920x1080 can be a problem, but couldn't find further info.
What happens when I try to render my video in 1080p with this image in a nested sequence is the encoding fails with AME giving me this log message -
" - Encoding Time: 00:00:01
09/22/2014 10:45:46 PM : Encoding Failed
Export Error
Error compiling movie.
Unknown error."
When I try to render in 720p with the image in the nested sequence it works fine. When I take the image out of the nested sequence and just put it on the "Master" sequence it also renders just fine, even in 1080p.
So my question is - why can't I render my project if I have this image in a nested sequence, and if possible, how can I fix it?
Thanks in advance.

Answer 1

Hello again,
While trying to do what you told me I've come across something interesting. Apparently it's not only that one image that's responsible for the problem. Here's how I have it setup:
Premiere for some reason seems to have trouble rendering the still image "BG2.png" (1920x1080) AND the problematic 5760x3240 nested image at the same time. As "BG2.png" does not actually appear until later, I tried cutting it just before the point where it should appear. With that, AME was able to render the video until the point where "BG2.png" started, then it failed again. So I checked in the nested sequence and also cut the 5760x3240 image (because it appears briefly in the start of the sequence then has its oppacity set to 0, it wasn't a problem). So what I had was the 5760x3240 image cut after it appeared (instead of just turning down the oppacity) and BG2 cut before it appeared, that way those images didn't overlap in the master sequence. With that, AME was able to render it just fine. So I have no idea why, but those 2 specific images won't let my sequence render when they ocuppy the same time. Any ideas?