Dear SPM Users, I used CONN version 17a, then 17f as SPM12 toolboxes running under Matlab R2017b on a Linux machine. Everything was running properly for a while but recently, everything I process in 17f as ROI-to-ROI is frozen in a stage of explorer results. Initially, I thought that's a memory issue because I had hundreds of participants. Recently I looked at a small group of 20 participants and the same issue appears again. After I select a couple of options in the explorer results, CONN becomes frozen (especially after I manually defined a set of ROI and selected them). It's not possible anymore to see the 3D representation or to analyse the table as before. Then I decided to do everything in CONN 18b as SPM12(7487) toolbox running under Matlab R2017b on a Linux. But unfortunately, the software is frozen even earlier, when I have to enter the smoothing kernel in the preprocesing steps. I need to mention that I have all three versions of CONN (conn17a, 17f and 18b) saved in the "toolbox" of SPM12. Please find below the error description: "ERROR DESCRIPTION: Error using figure First argument must be a figure object or a positive Integer Error in conn_menumanager (line 289) figure(CONN_MM.gcf); Error in conn (line 1465) conn_menumanager clf; Error in conn (line 1085) conn gui_setup; Error in conn_menumanager (line 120) feval(CONN_MM.MENU{n0}.callback{n1}{1},CONN_MM.MENU{n0}.callback{n1}{2:end}); CONN18.b SPM12 + BrainNet DEM FieldMap LST MEEGtools conn conn17a conn17f wfupickatlas Matlab v.2017b project: CONN18.b storage: 1705.8Gb available spm @ /usr/local/spm/12.0 conn @ /usr/local/spm/12.0/toolbox/conn" Do you have any suggestions? I would be happy to see 18b working. Thank you very much in advance. Larra