Dear Free Surfer experts

I am attempting to run a functional connectivity analysis on some resting state data. However, I keep getting stuck in this final step of the online Functional Connectivity Pathway. I have made a change based on discussion boards, but it do not help. CHANGE: in the mkanalysis step, I changed the "-taskreg L_Posteriorcingulate.dat 1" to "-taskreg L_Posteriorcingulate 1”. This did not solve the problem. My mkanalysis lines are as follows:

mkanalysis-sess -analysis fc.lpccseed.surf.lh -surface fsaverage lh -fwhm 5 -notask -taskreg L_Posteriorcingulate 1 -nuisreg vcsf.dat 5 -nuisreg wm.dat 5 -mcextreg -polyfit 5 -nskip 4 -fsd rest -TR TR2 -hpf .01 -force -per-run

mkanalysis-sess -analysis fc.lpccseed.surf.rh -surface fsaverage rh -fwhm 5 -notask -taskreg L_Posteriorcingulate 1 -nuisreg vcsf.dat 5 -nuisreg wm.dat 5 -mcextreg -polyfit 5 -nskip 4 -fsd rest -TR TR2 -hpf .01 -force -per-run

mkanalysis-sess -analysis fc.lpccseed.surf.mni305 -mni305 -fwhm 5 -notask -taskreg L_Posteriorcingulate 1 -nuisreg vcsf.dat 5 -nuisreg wm.dat 5 -mcextreg -polyfit 5 -nskip 4 -fsd rest -TR TR2 -hpf .01 -force -per-run

I then run the following:

selxavg3-sess -s 401 -a fc.lpccseed.surf.lh -overwrite

and the error that is produced is as follows: (what does "cannot find volume …” mean? and how might I fix this)

/Applications/freesurfer/LagStructure/413

-------------------------

$Id:
              fast_selxavg3.m,v 1.100.2.2 2012/11/30 18:40:38 greve Exp
              $

/Applications/freesurfer/fsfast/toolbox/fast_selxavg3.m

/Applications/freesurfer/fsfast/toolbox/fast_ldanaflac.m

/Applications/freesurfer/matlab/MRIread.m

-------------------------

outtop
              = /Applications/freesurfer/LagStructure

Extension
              format = nii.gz

ERROR:
              cannot find volume matching
              /Applications/freesurfer/LagStructure/413/rest/001/L_Posteriorcingulate

ERROR:
              loading nonpar reg
              /Applications/freesurfer/LagStructure/413/rest/001/L_Posteriorcingulate

------------------------------------------

ERROR:
              fast_selxavg3() failed\n