I believe only the Dynare team knows the exact meanings of these numbers, but I still would like to partially answer your question upon my own experiments.

First in MATLAB command window, type `stoch_simul`

. MATLAB reports an error: `Not enough input arguments.`

It then gives a routine:

```
Error in stoch_simul (line 21)
if isequal(options_.order,0)
```

to `stoch_simul.m`

file. Now open this m-file, and search for the key word `info`

. You will immediately realize that the function `stoch_simul`

calls for a pile of other functions. `info`

is not defined directly in `stoch_simul`

, but in these underlying functions.

Let’s have a try. In my current Dynare version 4.6.4, info can be found in Line 84 of stoch_simul.m:

```
[oo_.dr, info] = PCL_resol(oo_.steady_state,0);
```

in Line 89:

```
[~,info,M_,options_,oo_] = discretionary_policy_1(options_.instruments,M_,options_,oo_);
```

in Line 96:

```
[~,info,M_,options_,oo_] = resol(0,M_,options_,oo_);
```

in Line 105-109:

```
if info(1)
options_ = options_old;
print_info(info, options_.noprint, options_);
return
end
```

Then we type these related functions in MATLAB command window as before, finding that only `resol`

will present some useful messages:

```
>> resol
Not enough input arguments.
Error in resol (line 53)
if isfield(oo,'dr')
```

Finally open `resol.m`

. There are lots of `info`

meanings:

```
% REMARKS
% Possible values for the error codes are:
%
% info(1)=0 -> No error.
% info(1)=1 -> The model doesn't determine the current variables uniquely.
% info(1)=2 -> MJDGGES returned an error code.
% info(1)=3 -> Blanchard & Kahn conditions are not satisfied: no stable equilibrium.
% info(1)=4 -> Blanchard & Kahn conditions are not satisfied: indeterminacy.
% info(1)=5 -> Blanchard & Kahn conditions are not satisfied: indeterminacy due to rank failure.
% info(1)=6 -> The jacobian evaluated at the deterministic steady state is complex.
% info(1)=19 -> The steadystate routine has thrown an exception (inconsistent deep parameters).
% info(1)=20 -> Cannot find the steady state, info(2) contains the sum of square residuals (of the static equations).
% info(1)=21 -> The steady state is complex, info(2) contains the sum of square of imaginary parts of the steady state.
% info(1)=22 -> The steady has NaNs.
% info(1)=23 -> M_.params has been updated in the steadystate routine and has complex valued scalars.
% info(1)=24 -> M_.params has been updated in the steadystate routine and has some NaNs.
% info(1)=30 -> Ergodic variance can't be computed.
% Copyright (C) 2001-2018 Dynare Team
```

Alternatively, you may notice the snapshots:

and