I use dynare to solve a sticky price model where there are two small open economies. I always find the message below, anyone can help?

Warning: Divide by zero.

In rer1908_fff at 65

In dynare_solve at 41

In steady_ at 23

In steady at 7

In rer1908 at 202

In dynare at 26

Warning: Divide by zero.

In rer1908_fff at 67

In dynare_solve at 41

In steady_ at 23

In steady at 7

In rer1908 at 202

In dynare at 26

??? Error using ==> steady_

STEADY: convergence problems

Error in ==> steady at 7

steady_;

Error in ==> rer1908 at 202

steady(0);

Error in ==> dynare at 26

evalin(‘base’,fname) ;