[vdubreeze]

I always found the earlier versions of PT that had exporting as OMF to be pretty iffy.

If you don't mind losing automation it's dead simple to dupe the files in each track into a single file for each, starting at the same location. Then drag all into Reaper and when it asks if you want them on a single track or separate click the latter, and that's it. And slap new plugins on them.

If they have volume automations that you absolutely need you can bounce two tracks (or one stereo) at a time and as long as you give every bounce the same start you just drag them in. But duping (without automation/change to the original file) and dragging into new DAW is a much better way to go.