Hi Alfonso,
I find this error when running conn_withinbetweenROItest 

Error in conn_withinbetweenROItest
Y(:,:,:,n0)=permute(Z(iroi1,iroi2,:),[3,1,2]);

I have selected the ROI2ROI analysis with the group-analysis results:individual ROIs option and every combination of networks that I select returns me the same error. Could you help me, please?

Thank you in advance