Display informative message when the model cannot be solved at the prior mode.

matlab/cli/prior.m

@@ -128,6 +128,12 @@ if ismember('moments', varargin) % Prior simulations (2nd order moments).
     oo__.dr = set_state_space(oo__.dr, Model, options_);
     % Solve model
     [dr, info, Model , options__ , oo__] = resol(0, Model , options_ ,oo__);
+    if info
+        skipline()
+        disp(sprintf('Cannot solve the model on the prior mode (info = %s, %s)', num2str(info(1)), interpret_resol_info(info)));
+        skipline()
+        return
+    end
     % Compute and display second order moments
     oo__ = disp_th_moments(oo__.dr, [], Model, options__, oo__);
     skipline(2)

matlab/interpret_resol_info.m

+function message = interpret_resol_info(info)
+    
+% Returns a message describing problem encountered during the resolution of
+% a model.
+%
+% INPUTS 
+% - info       [struct]  Second output argument return by the resol routine
+%
+% OUTPUTS 
+% - message    [string]  Description of the issue preventing model's resolution.
+ 
+% Copyright (C) 2001-2016 Dynare Team
+%
+% This file is part of Dynare.
+%
+% Dynare is free software: you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation, either version 3 of the License, or
+% (at your option) any later version.
+%
+% Dynare is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+
+switch info(1)
+  case 0
+    message = '';
+  case 1
+    message = 'The model doesn''t determine the current variable uniquely.';
+  case 2
+    message = 'MJDGGES (Generalized Schur decomposition) returned an error code.';
+  case 3
+    message = 'Blanchard & Kahn conditions are not satisfied: no stable equilibrium.';
+  case 4
+    message = 'Blanchard & Kahn conditions are not satisfied: indeterminacy.';
+  case 5
+    message = 'Blanchard & Kahn conditions are not satisfied: indeterminacy due to rank failure.';
+  case 6
+    message = 'The jacobian evaluated at the deterministic steady state is complex.';
+  case 19
+    message = 'The steadystate routine thrown an exception (inconsistent deep parameters).';
+  case 20
+    message = sprintf('Cannot find the steady state (the sum of square residuals of the static equations is %s)', num2str(info(2)));
+  case 21
+    message = sprintf('The steady state is complex (the sum of square residuals of imaginary parts of the steady state is %s)', num2str(info(2)));
+  case 22
+    message = 'The steady state has NaNs.';
+  case 23
+    message = 'Parameters have been updated in the steadystate routine and some have complex values.';
+  case 24
+    message = 'Parameters have been updated in the steadystate routine and some are NaNs.';
+  case 30
+    message = 'Ergodic variance can''t be computed.';
+  otherwise
+    message = 'Unknown issue!';
+end
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