Unable to calculate steady state

[jpfeifer]

See

Dynare help :steady state has NaNs or Inf

Only do exp()-substitutions once the model runs. Even better, use auxiliary variables. See Question about understanding irfs in dynare - #4 by jpfeifer It should be lamda=log(lamdass);

Also,

gm = m - m(-1);

suggests your model has a unit root. See

Can Dynare estimate this SSM model?

It seems your model has one or more unit roots. In that case, there are infinitely many steady states and they cannot be endogenously computed. Please provide an analytical steady state.