Dear gPPI users, 

I need a help to do gPPI comparing sessions with different conditions. I found that someone replied that gPPI allows to compare conditions in different sessions but there was no instruction how it works. When I put my conditions for comparison in P.Tasks={'0' 'TT2_in' 'TT2_out' } like this, error "Estimation Failed PPI Contrasts were not estimated for some reason." was shown. 

Is there anyone who knows how to handle this problem or is there anything that I should be careful to compare conditions in different sessions? 

Thank you in advance. 

Pyungwon