OK, so SUMA is running fine on your computer, save for the mild Notice.
I assume then that you do see surfaces on your screen with the first suma command you typed:
suma -spec N27_both_tlrc.spec -sv TT_N27+tlrc
AND that afni has access to the dataset TT_N27+tlrc (i.e. you can look at it in AFNI). If that is the case, then you should be able to press 't' in SUMA and have it send the surfaces to AFNI.
You really should go through the class notes for using SUMA:
[
afni.nimh.nih.gov]
before you go any further.
You can also get the course data to try the commands in the document:
[
afni.nimh.nih.gov]
under Class Setup
cheers,
ziad