afni.nimh.nih.gov

There seems to have some issue on Mac with the most recent version (v1.13.0) of data.table

[rdrr.io]

To get around the problem, install an older version:

1) Download the older version from here to a temporal directory:

[cran.r-project.org]

2) At the terminal, execute the following command:

R CMD install data.table_1.12.8.tgz

Gang