Dear Dr. McLaren:
   Thanks for the exciting toolbox. As a beginner of gPPI, I managed to set up the parameters of ppi wrapper for an even-related fMRI task. However, when trying to run it, I was given the following error:

??? Input argument "regionnumber" is undefined.

Error in ==> ppi_wrapper_SWM at 19
P.VOI=regionfile{regionnumber};


The wrapper is as follows and the ppi_master_template I used is attached here. Any pointers are very miuch appreciated.
------------------------------------------------------------------------------
function ppi_wrapper(regionnumber,firstsubject,lastsubject)

%User input required (directories and subjects)
addpath('/mnt/HZLServer/matlab_toolboxes/spm8/toolbox/gPPI/PPPIv13')
addpath('/mnt/HZLServer/matlab_toolboxes/spm8')
Subjects={'TCRP004' 'TCRP005'};
%User input required (region files)
regionfile={'/mnt/HZLHD1/TCRP/data/TCRP004-1/Process/SpatialWM-fMRI/spm/1st_level/VOI_5_-70_32_mask.nii' '/mnt/HZLHD1/TCRP/data/TCRP004-1/Process/SpatialWM-fMRI/spm/1st_level/VOI_10_30_20'};
%'VPC1_sphere_roi.mat' 'VPC2_sphere_roi2.mat'};
%User input required (region names)
region={'VOI_5_-70_32' 'VOI_10_30_20'};
%'VPC1' 'VPC2'};
%User input required (master template)
load('/mnt/HZLHD1/gPPI/TCRP_ppi_master_template.mat')
P.VOI=regionfile{regionnumber};
P.Region=region{regionnumber};
for i=1:14;
%User input required (change directory to where the input structure should
%be saved)
save(['/mnt/HZLHD1/TCRP/data/' Subjects{i} '/Process/SpatialWM-fMRI/concate/1st_level/' region{regionnumber} '.mat'],'P');
try
%User input required directory of SPM.mat files
Directory=['/mnt/HZLHD1/TCRP/data/' Subjects{i} '/Process/SpatialWM-fMRI/concate/1st_level/'];
cd(Directory)
%User input required (directory same as line 23 above)
load(['/mnt/HZLHD1/TCRP/data/' Subjects{i} '/Process/SpatialWM-fMRI/concate/1st_level/' region{regionnumber} '.mat']);
P.subject=Subjects{i};
P.directory=Directory;
%User input required (change analysis to be more specific)
save([Subjects{i} '_analysis_' region{regionnumber} '.mat'],'P');
PPPI([Subjects{i} '_analysis_' region{regionnumber} '.mat']);
catch
disp(['Failed: ' Subjects{i}])
end
end
end

Hi again,
  Attached the wrong file in the previous posting.
  Here is the correct one.
  Thanks.

I'm currently away from my computer with matlab installed, so I can't check the parameter file.

However, the error is unrelated to the parameter file.

Hi Dr. MaLaren:
  I see. Thanks for the clarification.
  Please let me know your further comments/ suggestions when you have a chance to look at the pip_master_template.

Ming-Ching

Ming-Ching,

Two comments about the master file:
(1) There are no contrasts specified; and
(2) Depending on the design, you may want to specify the weighted field.

The program should run without setting these fields, but you will get no contrast images.

-Donald