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It looks to me like the warping part of the segmentation has not worked well. Before you begin. ensure that the data are approximately registered within about 4 cm and 20 degrees to the images (templates, canonical images, tissue probability maps etc) released with SPM. This should provide better starting estimates for the whole procedure, and reduce the possibility of it going completely wrong. Also, ensure that your data are in a suitable format (correct voxel sizes, appropriate values for scalefactors etc). Best regards, -John On Monday 08 August 2005 13:54, Jürgen Hänggi wrote: > Dear SPM5 users > > First, thanks a lot to John Ashburner for answering all my questions. > Now, there is a new problem. > I have segmented native T1 images with customised a priori maps > and the following error have occured: > > Running "Segment" > Warning: Divide by zero. > > > In spm_prep2sn>procrustes at 150 > > In spm_prep2sn at 22 > In spm_config_preproc>execute at 435 > In spm_jobman>run_struct1 at 1372 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct at 1339 > Warning: Divide by zero. > > > In spm_prep2sn>procrustes at 151 > > In spm_prep2sn at 22 > In spm_config_preproc>execute at 435 > In spm_jobman>run_struct1 at 1372 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct at 1339 > Warning: Matrix is singular to working precision. > > > In spm_prep2sn>procrustes at 170 > > In spm_prep2sn at 22 > In spm_config_preproc>execute at 435 > In spm_jobman>run_struct1 at 1372 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct at 1339 > Warning: Matrix is singular to working precision. > > > In spm_prep2sn>reparameterise at 84 > > In spm_prep2sn at 24 > In spm_config_preproc>execute at 435 > In spm_jobman>run_struct1 at 1372 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct at 1339 > Warning: Matrix is singular to working precision. > > > In spm_prep2sn>reparameterise at 85 > > In spm_prep2sn at 24 > In spm_config_preproc>execute at 435 > In spm_jobman>run_struct1 at 1372 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct1 at 1380 > In spm_jobman>run_struct at 1339 > -------------------------- > Done. > > What does it mean? > > Thanks a lot in advance > Best regards > Juergen > > ---------------------------------------------- > Juergen Haenggi, Ph.D. student > Division of Psychiatry Research > Psychiatric University Hospital > University of Zurich, Switzerland > P.O. Box 1931 > Lenggstrasse 31, 8032 Zurich > 0041 44 384 26 10 (office phone) > 0041 76 445 86 84 (mobile phone) > 0041 44 384 26 86 (fax) > H 115 (office room number) > [log in to unmask] (division email) > http://www.dpr.unizh.ch/ (division website) > http://www.juergenhaenggi.ch (private website) > ----------------------------------------------