Hi Alfonso,
Thank you again for your reply!
Yes you are right there was one subject missing one behavioral data, so I changed it to 0 now and updated the conn_network.m file, the 2nd level ROI-ROI results now work fine and can be viewed without problem.
However, the graph theory part still give me the following error when I clicked "Graph Theory" and refrain from clicking "OK":) also it does not write out any graph theory related results.

Sorry that this has been taking so many rounds to fix.. Thank you so much for all your time!

Here is the error:
ERROR DESCRIPTION:

Subscripted assignment dimension mismatch.
Error in conn_network_results (line 157)
glmresults.h(:,nout)=h;
Error in conn_displaynetwork (line 84)
data.Zmodel=conn_network_results({data.Zresults,data.Zmodel});
Error in conn (line 4710)
conn_displaynetwork('init',CONN_x.Results.xX.nsources);
Error in conn_menumanager (line 109)
feval(CONN_MM.MENU{n0}.callback{n1}{1},CONN_MM.MENU{n0}.callback{n1}{2:end});
CONN v.14.p
SPM8 + Anatomy ArtRepair Beamforming DEM FieldMap INRIAlign LI MEEGtools PPPI TOM8 aal marsbar wfupickatlas
Matlab v.2012b
storage: 1227.9Gb available
Warning: art.m overloaded by version in folder /data/apps/spm/8/toolbox/Art_detect

attached is the latest conn project file