Dear Dr Gaser and all CAT12 experts I faced the error message when I use the customized group DARTEL template in CAT12 r958. The file name of the customized DARTEL template is "wTemplate_1.nii" The following is the log file of the error message: ************************************************** CAT parallel processing with MATLAB PID: 3110 {Undefined variable "cat" or class "cat.output.ROI". Error in cat_run>update_job (line 184) if ~strcmp(nam,'Template_1_IXI555_MNI152') && strcmp(job.extopts.species,'human') && cat.output.ROI; Error in cat_run (line 152) job = update_job(job); } *************************************************** PS: I think the error may comes from the file selection part. There are two image volumes in wTemplate_1.nii file (I created the customized DARTEL template using affine GM and WM tissue segments), however the file selection GUI only read the first or second frame of the wTemplate_1.nii file. How could I select multi volume of the single file in CAT12 ? Best Paul