Log file indicates manual talairach alignment may be necessary.

ERROR: talairach_afd: Talairach Transform: transforms/talairach.xfm ***FAILED*** (p=0.0079, pval=0.0000 < threshold=0.0050)

Manual Talairach alignment may be necessary

Can anyone provide direction. Alternatively, the error indicates talairach alignment can be skipped with -notal-check flag. Is this step completely necessary?

jon