afni.nimh.nih.gov

Hi-

The error message is asking for the output file name to be provided differently---instead of an *absolute* path, like:

/A/B/C/file.nii.gz

... to use a relative path, so one that doesn't start with '/', like:

../D/B/C/file.nii.gz

So, perhaps try:

\mkdir tmp_ttest

3dttest++ -ClustSim -AminusB -prefix ./tmp_ttest/SN_ASDvsSSD.nii.gz \
-setA \
[setA list]
-setB \
[setB list]

--pt