The steady state is complex

Dear all
Have a nice day. I attempt to use dynare for simulation but the problem come out like:

Error using print_info (line 88)
The steady state is complex

Error in steady (line 104)
print_info(info,options_.noprint, options_);

Error in Model_Uncertainty (line 601)

Error in dynare (line 223)
evalin(‘base’,fname) ;

Any suggestion to help me overcome my issue is greatly appreciate. Thank you so muchModel_Uncertainty.mod (11.6 KB)

Check your steady state model. Your b_ss is slightly negative, but you still work with log(b). Use F9 in Matlab to sequentially execute your parameter definitions and the steady_state_model-block