Recently re-installed Morrowind after having last played years ago, read various boards and decided to mod w/ OpenMW and MO2, per this instructional video which I followed:

https://www.youtube.com/watch?v=cJvzXVi3lAg

I added Tamriel Rebuilt and Tamriel Data along w/ some other mods, checking every few installs that the base game ran ok.  But now finding that OpenMW won't run, starts and then quits with an error message:  "Archive 'TR_Data.bsa' not found"

Below are some of the things I've checked as a result of reading about possible things that could cause this error:

Here's a copy of my bsa registration from the openmw.cfg file.  Below is the path from further on down in the file, which is correct.  

fallback-archive=Morrowind.bsa
fallback-archive=Tribunal.bsa
fallback-archive=Bloodmoon.bsa
fallback-archive=TR_Data.bsa
fallback-archive=PT_Data.bsa

data="E:/Modding/MO2/Morrowind/mods/Tamriel_Data"
data="E:/Modding/MO2/Morrowind/mods/Tamriel Rebuilt"

The plugins are loading in this order, as specified somewhere else as potentially causing this, which I think is the correct order. 

content=Morrowind.esm
content=Bloodmoon.esm
content=Tribunal.esm

content=Tamriel_Data.esm

content=TR_Mainland.esm
content=TR_Mainland_2101_hotfix.ESP

All of the above are drawn from the MO2 ini editor, so I know this is the one it's accessing. 

Below are the archive statements from the morrowind.ini file, which I think are right:

Archive 0=Tribunal.bsa
Archive 1=Bloodmoon.bsa
Archive 2=PT_Data.bsa
Archive 3=TR_Data.bsa

When I switch the registered BSAs around, i.e., put the PT one first, the error message changes to reflect this.  So it's crashing when it hits that BSA statement and looks for that particular data file, and doesn't find it.  My question is, what is wrong with this setup that it's not finding it?  

Any help would be gratefully appreciated.