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Dear SPM users, I have set 1st level model specification and Model Estimation which has set dependency on 1st level specification. When I run the analysis, it fails in 2nd run of ReML algorithm. Please, could anyone help me to find a problem? The fMRI data were preprocessed with conn17b where standard SPM preprocessing steps were used + following CompCorr noise supression was done. Model matrix consist of 32 non-correlated columns of 4 sessions (1 seed signal regressor, 6 movement parameters, 1 constant member for each session). Kind regards, Rene ------------------------------------------------------------------------ Running job #1 ------------------------------------------------------------------------ Running 'fMRI model specification' SPM12: spm_fMRI_design (v5183) 10:45:47 - 16/04/2018 ======================================================================= Saving fMRI design : ...SPM.mat saved SPM12: spm_fmri_spm_ui (v6088) 10:45:47 - 16/04/2018 ======================================================================= Mapping files : ...done Calculating globals : ...done Saving SPM configuration : ...SPM.mat saved Design reporting : ...done Saving SPM configuration : ...SPM.mat saved Completed : 10:46:20 - 16/04/2018 Done 'fMRI model specification' Running 'Model estimation' SPM12: spm_spm (v6678) 10:46:21 - 16/04/2018 ======================================================================= SPM12: spm_est_non_sphericity (v6015) 10:46:25 - 16/04/2018 ======================================================================= Chunk 83/83 : ...processing Temporal non-sphericity (1 voxels) : ...ReML estimation ReML Block 1 Failed 'Model estimation' Index exceeds matrix dimensions. In file "/md2/labounek/toolbox/matlab/spm12/spm_est_non_sphericity.m" (v6015), function "spm_est_non_sphericity" at line 265. In file "/md2/labounek/toolbox/matlab/spm12/spm_spm.m" (v6678), function "spm_spm" at line 421. In file "/md2/labounek/toolbox/matlab/spm12/config/spm_run_fmri_est.m" (v5809), function "spm_run_fmri_est" at line 33. The following modules did not run: Failed: Model estimation