Provide better warnings when using ramsey_constraints

matlab/perfect-foresight-models/perfect_foresight_solver_core.m

@@ -99,8 +99,12 @@ else
                     sim1_lbj(oo_.endo_simul, oo_.exo_simul, oo_.steady_state, M_, options_);
               case 7
                 if options_.linear_approximation
-                    if isequal(options_.solve_algo, 10)
-                        warning('It would be more efficient to set option solve_algo equal to 0!')
+                    if isequal(options_.solve_algo, 10) 
+                        if options_.ramsey_policy && isfield(M_,'ramsey_model_constraints') && ~isempty(M_.ramsey_model_constraints)
+                            warning('Due to ramsey_constraints you should not specify your model as model(linear)!')
+                        else
+                            warning('It would be more efficient to set option solve_algo equal to 0!')
+                        end
                     end
                     [oo_.endo_simul, oo_.deterministic_simulation] = ...
                         solve_stacked_linear_problem(oo_.endo_simul, oo_.exo_simul, oo_.steady_state, oo_.exo_steady_state, M_, options_);

matlab/test_for_deep_parameters_calibration.m

@@ -42,7 +42,7 @@ if ~isempty(plist)
     end
     tmp = dbstack;
     message = [message, ' when using ' tmp(2).name '. '];
-    message = [message, 'If these parameters are not initialized in a steadystate file or a steady_state_model-block, Dynare may not be able to solve the model...'];
+    message = [message, 'If these parameters are not initialized in a steadystate file or a steady_state_model-block, Dynare may not be able to solve the model. Note that simul, perfect_foresight_setup, and perfect_foresight_solver do not automatically call the steady state file.'];
     message_id  = 'Dynare:ParameterCalibration:NaNValues';
     warning('off','backtrace')
     warning(message_id,message);