Premiere Pro 6 AAF export variable rate error. Why?

Hello,
I'm trying to export an AAF out of Premiere Pro 6 and it says variable rate error.
I've been scouring to try and find a reason for this error and so far no luck.
The footage in the timeline is REDEpic footage. The framerate is 23.976.
Many of the clips have timewarps/timeremapping on them.
I did not build the project, so please be aware of my ignorance about this Premiere Pro file.
I'm only trying to get the AAF to conform elsewhere. How do I fix this or what is the problem?
Thank you for your help.

This might be relevant:
Exporting AAF files
(Excerpt):
"The plug-in converts video clip speed changes (slow, fast,
reverse playback) to the Avid Media Composer Motion Effect,
which is the only supported effect."
If you aren't conforming in Avid, here's a time-consuming workaround:
Export all of the timewarp / time remap clips from Premiere to
lossless digital intermediate (DI) files, then use them to replace
the original clips in a duplicate Timeline before exporting your AAF.
Lossless codecs:
Lagarith Lossless Video Codec (pc only)
http://lags.leetcode.net/codec.html
Ut Video Codec Suite (pc or mac)
http://www.videohelp.com/tools/Ut-Video-Codec-Suite
Virtually lossless codec:
Avid Codecs 2.3.7 - DNxHD (pc or mac)
http://avid.force.com/pkb/articles/en_US/download/en423319
note:
Your selected lossless codec will need to be installed on both systems.

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