Hi Alfonso, 

I have been running a cross-sectional analysis with several second level covariates. I entered them in the GUI and know that each one has a value. However when I run a SBC and ROI to ROI analysis I keep getting the following error: 

ERROR DESCRIPTION:
 
Error using conn_process
Null design matrix (all subjects have missing data or all selected covariates have zero or NaN values). Please check your
second-level covariates

Error in conn_process (line 99)
 case 'results_voxel', [varargout{1:nargout}]=conn_process(16,varargin{:});

Error in conn (line 12387)
 else conn_process('results_voxel','dosingle','seed-to-voxel');

Error in conn (line 11468)
 if state==2, conn gui_results_wholebrain;
CONN22.a
SPM12 + DAiSS DEM FieldMap MEEGtools
Matlab v.2023a
project: CONN22.a
storage: 890.9Gb available
 
spm @ /Users/corpuscallosum/Documents/MATLAB/spm12
conn @ /Users/corpuscallosum/Documents/MATLAB/conn

Do you have advice for how to figure out where the error is and why it is occuring? 

Thank you, 

Lauren