Dear gPPI users,

I have GLM with two sessions.
1) gPPI runs well for GLM without parametric modulations and P.ConcatR=1
2) gPPI runs well for GLM with parametric modulations and P.ConcatR=0
3) gPPI gives an error for GLM with parametric modulations and P.ConcatR=1: "Estimation Failed".

How can I solve this problem?

Hi,

Can you post the rest of the output. It's hard to know where the estimation failed without seeing the entire MATLAB screen output.



Originally posted by Ruslan Masharipov:

When I use "P.ConcatR=1", I get:

Log File: 01_Subject_PPPI_7_20_2018_4.log

PPPI Version: 13.1.4-17-2014
Parameters used:
Processing subject: 01_Subject
VOI file : F:\SPM DATA\gPPI_ROI\mask.nii
Output file will be: 01_Subject_mask_session#_cond_PPI_regressors.txt
Contrast : Omnibus F-test for PPI Analyses
Analysis : Psychophysiological Interactions
Extraction : eigenvariate
Tasks : _0_Cond1_Cond2_Cond3_Cond4_Cond5_Cond6_Cond6xPM1^1_Cond7_Cond8_Cond9_Cond10_Cond11_Cond12_Cond13_Cond13xPM2^1_Cond14
Method : Condition Specific
VOI has 11 voxels in 3x3x3 space
VOI has 11 voxels in 3x3x3 space. This is in the the same space as the input data and functional mask.
VOI has 11 voxels in 3x3x3 space
VOI has 11 voxels in 3x3x3 space. This is in the the same space as the input data and functional mask.
Estimation Failed
Generate Contrast Vectors
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Generate Contrasts
PPI Contrasts were not estimated for some reason.
ans =
xY: [1x1 struct]
xBF: [1x1 struct]
nscan: [498 523]
Sess: [1x2 struct]
factor: []
xGX: [1x1 struct]
xM: [1x1 struct]
xX: [1x1 struct]
xVi: [1x1 struct]
SPMid: 'SPM12: spm_spm (v6842)'
xsDes: [1x1 struct]
swd: 'F:\SPM DATA\gPPI\01_Subject\Stat\PM_GLM'
xVol: [1x1 struct]
Vbeta: [1x30 struct]
VResMS: [1x1 struct]
VM: [1x1 struct]
xCon: [1x37 struct]

When I use "P.ConcatR=1", everything is OK

Can someone explain this? I was also struggling getting things done and then changing this parameter made the script move on