Dear Dr. McLaren,

Thank you for your message. I checked the createVec result by using the P parameters and SPM.mat file obtained through "PPPI(P)" (what I sent to you before, created under "PPI_ROI_49_49_-9" folder). Then the following message appeared:

>> [vec,left,right] = createVec(P.Contrasts(1).left,P.Contrasts(1).right,SPM,0,P.Contrasts(1).Prefix,[],4)
Valid Contrast
vec =
0 1 0 0 -1 0 0 0

left =
cell
'Task1'

right =
cell
'Task2'

When I used the original SPM.mat, "createVec" said Invalid Contrast.
PPPI(P) seemed that it created exact contrast and stored it in SPM.mat.
Please let me suggest what should I go for next. Should I retry by using SPM.mat under "PPI_ROI_49_49_-9" folder?

Best,
Takeshi