Dear SPM experts, I'm trying to use multiple conditions file with parametric modulators for the first time and I cannot figure out what I;m doing wrong. After using the attached .mat file I get the following error during model specification: Running 'fMRI model specification' SPM12: spm_fMRI_design (v5183) 21:16:51 - 05/12/2014 ======================================================================= Failed 'fMRI model specification' Error using sprintf Function is not defined for 'cell' inputs. In file "D:\matlab-tb\spm12\spm_get_ons.m" (v4855), function "spm_get_ons" at line 109. In file "D:\matlab-tb\spm12\spm_fMRI_design.m" (v5183), function "spm_fMRI_design" at line 221. In file "D:\matlab-tb\spm12\spm_fmri_spm_ui.m" (v6088), function "spm_fmri_spm_ui" at line 183. In file "D:\matlab-tb\spm12\config\spm_run_fmri_spec.m" (v6157), function "spm_run_fmri_spec" at line 360. The following modules did not run: Failed: fMRI model specification Is this a bug, or is something wrong with my multiple conditions file? Best regards, Marcel