Rank condition is not verified.help

hi ,i have dsge model similar jermann and quadrini(2012).i have rank condition is not verified.but i check for timing error,and i cant find any thing.please help me.
dynare file is in the google drive link.

You have a difference of two roots. I can only give you the generic advice: try to simplify your model and pay particular attention to the timing.

whats the meaning of difference of two roots?can you explain more?
it is possible tricks exist that i find timing error?
note that it is similar your replication jermann and quadrini(2012)