[marsbar] error message

Dear marsbar users,

I'm deriving the effect size of each ROIs from each subject and have succeeded
in getting stats from 9 out of 11 ROIs. For the other 2 ROIs, marsbar showed me
this error message in matlab's command window.

Error in ==> maroi.getdata at 30
if nargin < 2

??? Output argument "vXYZ" (and maybe others) not assigned during call to
"/Applications/spm8/toolbox/marsbar/ <at> maroi/getdata.m (getdata)".

Error in ==> maroi.get_marsy at 76
  [y vals vXYZ mat]  = getdata(o, VY);

These 2 ROIs were tiny spots so I suspect that these regions might reflect
noise. Is the size of the ROI one of the reasons that result in this error
message? What should I do to fix this problem if I really want to get the stat
from these ROIs?

Many thanks!

Sien

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