I am trying to do image registration and I am using the CMTK Registration GUI plugin developed by the Jefferis Lab (https://github.com/jefferis/fiji-cmtk-gu...).
This plugin creates a command file, but when I try to run the command file, I am getting this error:


ERROR: nrrd library returned error '[nrrd] nrrdLoad: trouble reading "refbrain/refbrain.nrrd"
[nrrd] nrrdRead: trouble
[nrrd] _nrrdRead: trouble reading NRRD file
[nrrd] _nrrdFormatNRRD_read: trouble parsing space directions info |(0.38,0,0) (0,0.38,0)|
[nrrd] _nrrdReadNrrdParse_space_directions: trouble getting space vector 1 of 2
[nrrd] _nrrdSpaceVectorParse: space dimension is 2, but seem to have 3 coefficients
'
ERROR: could not read image geometry from refbrain/refbrain.nrrd
MYEXEC: CMD = /Applications/Fiji.app/bin/cmtk/registration -i -v --dofs 6 --dofs 9 --accuracy 0.4 -o Registration/affine/refbrain_DdcGal4_01_9dof.list refbrain/refbrain.nrrd images/DdcGal4_01.nrrd exited with value 1
Aff:DdcGal4_01 INFO: number of threads set to 2 according to environment variable CMTK_NUM_THREADS
ERROR: nrrd library returned error '[nrrd] nrrdLoad: trouble reading "refbrain/refbrain.nrrd"
[nrrd] nrrdRead: trouble
[nrrd] _nrrdRead: trouble reading NRRD file
[nrrd] _nrrdFormatNRRD_read: trouble parsing space directions info |(0.38,0,0) (0,0.38,0)|
[nrrd] _nrrdReadNrrdParse_space_directions: trouble getting space vector 1 of 2
[nrrd] _nrrdSpaceVectorParse: space dimension is 2, but seem to have 3 coefficients
'
ERROR: could not read image geometry from refbrain/refbrain.nrrd
MYEXEC: CMD = /Applications/Fiji.app/bin/cmtk/registration -i -v --dofs 6 --dofs 9 --accuracy 0.4 -o Registration/affine/refbrain_DdcGal4_01_9dof.list refbrain/refbrain.nrrd images/DdcGal4_01.nrrd exited with value 1
Ran 0 initial affine registrations of which 0 failed
Ran 2 affine registrations of which 2 failed
Ran 0 warp registrations
Reformatted 0 images
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

As the reference brain I am using the maximum projection of JRC2018_UNISEX_20x_HR.nrrd.

Any help in explaining me what I could be doing wrong? I would really appreciate it.