Hi Oori,
It was a silly bug in the command line parsing routines. I fixed it and tested the new code on your sample data.
For barycentric interpolation:
SurfToSurf -prefix SurfToSurf.Interpolation.try4 -i_fs ODS_02Verb1_lh_mesh140_std.smoothwm.asc -i_fs lh.smoothwm.asc -output_params Data -data FSread.output\[1]
For nearest-neighbor:
SurfToSurf -prefix SurfToSurf.NearestInterpolation.try4 -i_fs ODS_02Verb1_lh_mesh140_std.smoothwm.asc -i_fs lh.smoothwm.asc -output_params Data NearestNode -data FSread.output\[1]
You'll have to wait for binaries newer than the time stamp on this posting.
cheers,
-z