Fail to transform EPI from Talairach space into MNI space

That apar dataset does not contain the information needed for adwarp. There are other methods to transform between these spaces that are described here:

One of those methods uses the affine+nonlinear alignment between the TT_N27 and the MNI 2009c templates. You can do this yourself, or use the precomputed transformations here and apply it with this command to transform your data. You will have to supply a dataset with appropriate coverage and resolution for the grid in MNI space.


3dNwarpApply -nwarp \
 '../TTN27_to_MNI152_2009c/anatQQ.TTN27_WARP.nii ../TTN27_to_MNI152_2009c/anatQQ.TTN27.aff12.1D' \
     -prefix temp_MNI2009c_desai_${atlas}_MPM.nii.gz  -short \
     -source ~/abin/TT_desai_${atlas}_mpm+tlrc. \
     -master myepi_master.nii.gz