help > gPPI error in timeseries_extract
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Apr 29, 2020  01:04 AM | Rozemarijn van Kleef
gPPI error in timeseries_extract
Dear experts,

I'm having some trouble running the generalized PPI toolbox, I'm hoping you might be familiar with the error I encounter.

I get the following output when I set the contrast to the omnibus F test:

Log File: sub-01_PPPI_4_29_2020.log
PPPI Version: 13.1.4-17-2014
Parameters used:
Processing subject: sub-01
VOI file          : /data/sub-01/amygd_left_sub-01.nii
Output file will be: sub-01_amygd_left_session#_cond_PPI_regressors.txt
Valid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Valid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Valid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Valid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Valid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Valid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Valid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
ESS image  1                    : (spm_resss)   ten ess_0001.img
spm{F} image  1                 :       ...written spmF_0001.img
Contrast          : Omnibus F-test for PPI Analyses
Analysis          : Psychophysiological Interactions
Extraction        : eigenvariate
Tasks             : ALL
Method            : Condition Specific
VOI has 32 voxels in 3x3x3 space
VOI has 32 voxels in 3x3x3 space. This is in the the same space as the input data and functional mask.
Index exceeds matrix dimensions.
Error in timeseries_extract (line 369)
Error in PPPI (line 461)
Error in gppi_20200327 (line 38)
PPPI(P);

Line 369 in timeseries_extract is:
if xY.Ic~=0
y=y-spm_FcUtil('Y0',SPM.xCon(xY.Ic),SPM.xX.xKXs,beta);
end

I don't get this error when I set the contrast to 0, but if I understood correctly, it's better to use the omnibus F test here to get rid of noise, right?

I hope you can shed some light on this error, thanks a lot!

Kind regards,
Rozemarijn