[Gm2] gm2 failing. Don't know why

[rob solomon]

I'm starting simple tests w/ gm2 using my own code that I've used w/ 
StonyBrook M2 over the years.  I have
export GM2IPATH=/home/rob/m2/MyDefs:/home/rob/m2/MyMods

Then I did
gm2 -g -fiso TestEnvirong.mod -o TestEnvirong 2>testgm2error.txt

And I got this error:
gm2: 
/home/rob/m2/MyDefs:/home/rob/m2/MyMods:/opt/gm2/lib/gcc/x86_64-linux-gnu/4.1.2/gm2/iso:/opt/gm2/lib/gcc/x86_64-linux-gnu/4.1.2/gm2/pim:/opt/gm2/lib/gcc/x86_64-linux-gnu/4.1.2/gm2/iso:/opt/gm2/lib/gcc/x86_64-linux-gnu/4.1.2/gm2/pim: 
No such file or directory
failed to find definition module SYSTEM.def


This is under Ubuntu 13.04.
What am I doing wrong?