Hi, Have any of you come across this matlab error before when using SPM batch files. If so what does it really mean and what sort of things did you do to correct the problem. I think it might be something with the way i have written my batch buy am not 100% sure. Matlab error message:- Warning: c is not a proper contrast in +c->Tsp in spm_SpUtil !!! projecting... >...............SPM2/spm2/spm_SpUtil.m at line 323 ..............SPM2/spm2/spm_FcUtil.m at line 215 In ........../spm_batch_Gavin_Enc_Retc.m at line 338 from c = 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 to c = 0 0 0.5000 0 0 0 0 0 0 0 0 0 0.5000 0 0 0 0 0 0 0 0 0 -1.0000 0 0 0 0 0 0 0 0 0 0 -- Gavin St. John Heath University of Oxford Department of Experimental Psychology South Parks Road OX1 3UD Oxford United Kingdom Tel: +44 (0)1865 271435