**First issue, why am I receiving the following errors and how do I remedy it?**
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Trial 1:
3dROIstats -mask 'TT_Daemon::amygdala' stats.s9999+tlrc.'[1]'
File Sub-brick Mean_71
*+ WARNING: Input dataset stats.s1018+tlrc.[1] is different size than mask - skipping
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Trial 2:
3dcalc -a stats.s9999+tlrc. -b 'TT_Daemon::amygdala' -expr 'a*step(b)' -prefix ROI.Amgy -datum short
++ 3dcalc: AFNI version=AFNI_2008_07_18_1710 (Jan 23 2009) [32-bit]
++ Authored by: A cast of thousands
** FATAL ERROR: dataset TT_Daemon::amygdala differs in size from others
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stats (func dataset) was processed by afni_proc.py using the defualts then adwarped with anat that was talairached by hand.

**Second issue, is it incorrect to create a mask this way?**

Trial 3:
3dfractionize -template stats.s9999+tlrc -input 'TT_Daemon::amygdala' -clip 0.5 -preserve -prefix ROI.Amyg
++ 3dfractionize: AFNI version=AFNI_2008_07_18_1710 (Feb 4 2009) [32-bit]
++ Authored by: RW Cox
++ Found 1 distinct nonzero values in input.
-- Writing 294 nonzero voted voxels to dataset ./ROI.Amyg+tlrc.BRIK
3dROIstats -mask ROI.Amyg+tlrc 'stats.s9999+tlrc[1]'
File Sub-brick Mean_71
stats.s9999+tlrc[1] 0[Hostile_A] -0.079870