I try to estimate a second level batch with a 2-sample test design and always receive the error message:
Error using spm_est_non_sphericity (line 196)
Please check your data: There are no significant voxels.
Error in spm_spm (line 418)
[xVi, am] = spm_est_non_sphericity(SPM);
Error in spm_getSPM (line 234)
SPM = spm_spm(SPM);
Error in spm_results_ui (line 261)
[SPM,xSPM] = spm_getSPM;
Error while evaluating uicontrol Callback
I have checked the contrast images for all included subjects and all of them show activation. Do you know what went wrong here?
Thank you very much