I get this error when I try to rebuild the patch:

Traceback (most recent call last):
File "C:\Games\Bethesda Softworks\Oblivion\Mopy\basher.py", line 4017, in Execute
raise
File "C:\Games\Bethesda Softworks\Oblivion\Mopy\basher.py", line 3979, in Execute
patchFile.buildPatch(log,SubProgress(progress,0.8,0.9))
File "C:\Games\Bethesda Softworks\Oblivion\Mopy\bosh.py", line 12779, in buildPatch
patcher.buildPatch(log,SubProgress(subProgress,index))
File "C:\Games\Bethesda Softworks\Oblivion\Mopy\bosh.py", line 17129, in buildPatch
blueEyeMesh = eye_mesh[(GPath('Oblivion.esm'),0x27308)]
KeyError: (bolt.Path('Oblivion.esm'), 160520)

I have no idea what any of this means, or why it's happening.

Good lord, I just figured out it was because Oblivion.esm wasn't checked.

I'm very sorry for wasting space on here.

What version of Wrye Bash is that? I haven't seen an eye mesh error in quite a while.

I did figure out what the issue was, embarrassingly 5 seconds after I posted.

Anyway, the version of Bash I'm using is version 275.

EDIT: Thank you for asking me that question, BTW. If you hadn't, I wouldn't have noticed that I have an old version of Bash, and that All Natural requires at least 284.