I've been trying to do a 4-factor ANOVA using Gang's 'GroupAna' script. I keep getting the same error messages while processing the first slice:

...Done with 3rd order contrast information.

Total slices along Z axis: 151 - You can estimate the total runtime
by multiplying the runtime for each slice from down below.

Running analysis on slice:
#1... ??? Error using ==> isfield
Not enough input arguments.

Error in ==> CheckBrikHEAD at 193
if (isfield('BRICK_LABS') & (WordCount(Info.BRICK_LABS, '~') ~= Info.DATASET_RANK(2))),

Error in ==> WriteBrik at 242
[err, ErrMessage, Info] = CheckBrikHEAD(Info);

Error in ==> GroupAna at 2198
[err2, ErrMessage, NewInfo] = WriteBrik(reshape(M, D1, D2, 1, Info.DATASET_RANK(2)), Info, Opt);


Anyone seen this before and/or have some idea of what's going on here?

Thanks, in advance, for your help,
Adam