Hi Anita,
You have run out of memory for all of those operations.
How big is your EPI dataset (the output of "ls -lh" on
the .BRIK file), and how big is your Rbuck dataset?
Maybe if you restart afni and simply load these datasets
and nothing else... There is also the option of purging
memory when running afni, but I would expect afni to do
that itself in this case.
Define Datamode -> Misc -> Purge Memory
In any case, you have used up more than 3 Gigabytes just
running afni, so it seems like those datasets are very
big. Your machine is overwhelmed.
How much RAM do you have?
- rick