Some more info that might be helpful…when BDP terminates with this mask error, it has created the following files, and two of these (86_f000_Acute_anat_brain_RAS.dwi.RAS.rearranged.b0s.nii, and 86_f000_Acute_anat_brain_RAS.bfc.nii) are not present in the BDP output from before when I had it working on another system (perhaps these are intermediate files which get cleaned up after, just thought I’d mention it).
86_f000_Acute_anat_brain_RAS.dwi.RAS.rearranged.b0s.nii.gz
86_f000_Acute_anat_brain_RAS.bfc.nii.gz
86_f000_Acute_anat_brain_RAS.dwi.bmat
86_f000_Acute_anat_brain_RAS.dwi.RAS.bmat
86_f000_Acute_anat_brain_RAS.dwi.RAS
86_f000_Acute_anat_brain_RAS.dwi.RAS.nii.gz