I have faced an issue with preproc-sess and I appreciate your help. I have a single slice EPI scan (number of TRs > 500; TR=0.2). When I tried to do preproc-sess, mc-afni2 is called and it crashed. When I checked the log, I noticed this:
3dvolreg.afni -verbose -dfile 005/fmcpr.mcdat -1Dmatrix_save 005/fmcpr.mat -base 005/tmp.mc-afni2.4869/tempvol.nii.gz -prefix 005/tmp.mc-afni2.4869/outvol.nii.gz 005/tmp.mc-afni2.4869/invol.nii.gz
++ 3dvolreg: AFNI version=AFNI_2011_12_21_1014 (Aug 29 2012) [64-bit]
++ Authored by: RW Cox
*+ WARNING: If you are performing spatial transformations on an oblique dset,
such as 005/tmp.mc-afni2.4869/tempvol.nii.gz,
or viewing/combining it with volumes of differing obliquity,
you should consider running:
3dWarp -deoblique
on this and other oblique datasets in the same session.
See 3dWarp -help for details.
++ Oblique dataset:005/tmp.mc-afni2.4869/tempvol.nii.gz is 30.100002 degrees from plumb.
++ Reading in base dataset 005/tmp.mc-afni2.4869/tempvol.nii.gz
++ Oblique dataset:005/tmp.mc-afni2.4869/invol.nii.gz is 30.100002 degrees from plumb.
++ Reading input dataset 005/tmp.mc-afni2.4869/invol.nii.gz
++ Edging: x=3 y=3 z=0
++ Creating mask for -maxdisp
+ Automask has 847 voxels
+ 847 voxels left in -maxdisp mask after erosion
++ Initializing alignment base
*** mri_3dalign_setup: cannot use nD images!
** Can't initialize base image for alignment
ERROR: 3dvolreg.afni
Invalid null command.
Any suggestions?
Please note that, this data is properly registered (manually and based on an auxiliary volume) and there is no problem there.