Dear Dr. McLaren and gPPI forum users,

I‘m using the  toolbox to calculate gPPI and I have 26 VOIs. However, I encountered a problem that not all my VOIs generated final results. And all the processes of these failed VOIs showed:

VOI has 114 voxels in 2x2x2 space
Voxels do not exist; image and VOI do not overlap entirely; VOI must be within the image.
OR No voxels in VOI. Program will exit

And I also found that different subjects have different failed VOIs. I'd like to know the reason of the error and the recommended way to solve it. Because after the preprocessing, I believe all my subjects's BOLD nii file should be in standard space. 

I also have another question that can the toolbox calculate the gPPI on brain parcels  level rather than VOIs to whole brain?

I would be grateful for any help you could offer, thank you!

Xiaoying Sun

        cd([indOutPath f 'GLM']);
        create_sphere_image([allSbjPath '\' allSbjDir(sbj).name '\3D_001.nii'],ROI_LIST(i,:),{['VOI_' num2str(i)]},6); %here I used a 3D nii of each subjects to create the VOI
        P.subject=allSbjDir(sbj).name;
        P.directory=[indOutPath f 'GLM'];
        P.VOI=[indOutPath f 'GLM' f 'VOI_' num2str(i) '_mask.nii'];
        P.Estimate=1;
        P.contrast=0;
        P.extract='eig';
        P.Tasks={'1'  '5Hz'  '10Hz'  '20Hz'};
        P.Weights=[];
        P.analysis='psy';
        P.method='cond';
        P.CompContrasts=1;
        P.Weighted=0;
        P.Contrasts(1).left={'20Hz'};
        P.Contrasts(1). right={'5Hz'};
        P.Contrasts(1).STAT='T';
        P.Contrasts(1).Weighted=0;
        P.Contrasts(1).name='20Hz_minus_5Hz';
        P.Contrasts(2).left={'20Hz'};
        P.Contrasts(2).right={'10Hz'};
        P.Contrasts(2).STAT='T';
        P.Contrasts(2).Weighted=0;
        P.Contrasts(2).name='20Hz_minus_10Hz';
        P.Contrasts(3).left={'10Hz'};
        P.Contrasts(3).right={'5Hz'};
        P.Contrasts(3).STAT='T';
        P.Contrasts(3).Weighted=0;
        P.Contrasts(3).name='10Hz_minus_5Hz';
        P.equalroi=0;
        P.FLmask=1;
        PPPI(P);