Dear Dr. McLaren,

I am trying to calcuate psycho-physiophysio interaction and to specify VOI2 region. In order to do that I adding the following lines to the standard parameter file:

%User input required (region files)
regionfile={'/folder/VOI1.nii' '/folder/VOI2.nii'};

%User input required (region names)
region={'AREA1' 'AREA2'};

%User input required (master template)
P.VOI=regionfile{regionnumber};
P.Region=region{regionnumber};
P.VOI2=regionfile{2};
P.Region2=region{2};

In accordance with that the P.VOI2 and P.Region2 lines were also added to master template mat file (with brakets).
As a result I am getting error message:

Processing subject: sbj01
VOI file : /folder/VOI1.nii
VOI2 file : /folder/VOI2.nii

ERROR 1: Program will exit. VOI2 has no region name associated with it.
ERROR 2: PPPI inputs were specified correctly, but failed error checking for dependencies. See errorval{1}.
One or more inputs are not correct.
ERROR 1:Program will exit. VOI2 has no region name associated with it.
ERROR 2:PPPI inputs were specified correctly, but failed error checking for dependencies. See errorval{1}.
errorvals saved to errorvals.mat


Should I add some more information to the parameter file to associate name with VOI2 file?

Best regards Maxim Kireev

This issue is that you defined:

P.Region=region{regionnumber};

and 

P.Region2=region{2}.

Region2 is not a valid field for the Parameter structure field. The code internally splits the Region name based on a space in a string variable or based on the cell number.

Please specify P.Region as P.Region=region;

I've modified the code to accept the cell array.