Dear experts,
I apologize if this topic has been already posted, but I could not find it in the list.

I am using CONN to analyze task-related connectivity on fMRI data from 56 healthy participants.In particular, I aim to investigate if and how connectivity among regions is modulated by a continuous behavioral measure (specified as a between-subjects ROI).
In the Setup stage I have specified all the smoothed-normalized-realigned fMRI data, as well as normalized structural T1 data (and grey, white and csf segments as ROIs). I performed all roi-to-roi, seed-to-roi and voxel-to-voxel first-level analyses (using bivariate correlation, up to now), and I am now exploring second-level results.
In particular, in the ROI-TO-ROI section I can visualize the ROI-TO-ROI results explorer, but not the Graph-Theory results explorer, which produces the following error message. It seems to me that Conn cannot load the background image. I have already checked that the SPM folder is on the Matlab-path (right below the Conn folder), and the AVG152T1.nii is in the "canonical" SPM folder.

Do you have any suggestions?

Thank you very much in advance,
best,
nicola

??? Undefined function or variable 'CONN_refs'.

Error in ==> conn_displaynetwork at 112
        elseif
        isfield(CONN_refs,'canonical')&&isfield(CONN_refs.canonical,'filename')&&~isempty(CONN_refs.canonical.filename)
       
Error in ==> conn at 2434
            conn_displaynetwork('init',CONN_x.Results.xX.nsources);

Error in ==> conn_menumanager at 116
                            feval(MM.MENU{n0}.callback{n1}{1},MM.MENU{n0}.callback{n1}{2:end});
??? Error while evaluating figure WindowButtonUpFcn