Dear experts 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 André