Thank you Alfonso again for your reply!
I'm sorry that error comes up again after running this, everything seems works perfectly in the setup, and I checked the conditions and covariates, all look fine, but then in the denoising step, when I click on session 2 data for each subject it'll give me error and can't display, but session1 data is ok. Also then when I clicked first level analysis, seems both sessions are fine to check.

Could you check my conn file to see if you can spot anything weird, I did try to rerun the setup step again as it suggested in the error message, however, it still gives me the same error..
ERROR DESCRIPTION:

Index exceeds matrix dimensions.
Error in conn (line 2575)
CONN_h.menus.m_preproc.Xs=spm_get_data(CONN_h.menus.m_preproc.XS(1),pinv(CONN_h.menus.m_preproc.XS(1).mat)*xyz');
CONN v.14.p
SPM8 + Anatomy ArtRepair Beamforming DEM FieldMap INRIAlign LI MEEGtools PPPI TOM8 aal marsbar wfupickatlas
Matlab v.2012b
storage: 1259.1Gb available
SUGGESTIONS:
Potential missing Setup information. Try revising Setup fields for potential missing information

ps, after seeing the error, I tried to move task conditions except rest to covariates according to your suggestion on looking at "resting state" during a task by Fair et al., (but I'll have 2 different kind of resting state since the two tasks are fundamentally two different states).



Thank you again and happy new year!
Xiaozhen