added steady option stop_on_error. stop_on_error = 0 permits to

continue (for example, when chaining homotopy steps), even if the
steady state computation was not successful.

doc/dynare.texi

@@ -2430,6 +2430,23 @@ Defines the number of steps when performing a homotopy. See
 
 @item nocheck
 Don't check the steady state values when they are provided explicitely either by a steady state file or a @code{steady_state_model} block. This is useful for models with unit roots as, in this case, the steady state is not unique or doesn't exist.
+
+@item stop_on_error = @var{INTEGER}
+Normally, @code{steady} stops on error with a message. However, in
+special circumstances, such as chaining homotopy steps, it may be useful
+to let it continue to the next step even if the current one was not
+successful. @code{stop_on_error} can take two values:
+@table @code
+
+@item 0
+@code{steady} doesn't stop on error
+
+@item 1
+@code{steady} stops on error
+@end table
+
+@noindent
+Default is @code{1}
 @end table
 
 @examplehead

matlab/global_initialization.m

@@ -80,6 +80,7 @@ else
 end
 options_.steadystate_partial = [];
 options_.steadystate.nocheck = 0;
+options_.steady.stop_on_error = 1;
 
 % subset of the estimated deep parameters
 options_.ParamSubSet = 'None';

matlab/steady.m

@@ -55,7 +55,7 @@ end
 
 [oo_.steady_state,M_.params,info] = steady_(M_,options_,oo_);
 
-if info(1)
+if info(1) && options_.steady.stop_on_error
     print_info(info,options_.noprint);
 end
 

preprocessor/DynareBison.yy

@@ -130,7 +130,7 @@ class ParsingDriver;
 %token UNIFORM_PDF UNIT_ROOT_VARS USE_DLL USEAUTOCORR GSA_SAMPLE_FILE
 %token VALUES VAR VAREXO VAREXO_DET VAROBS PREDETERMINED_VARIABLES
 %token WRITE_LATEX_DYNAMIC_MODEL WRITE_LATEX_STATIC_MODEL
-%token XLS_SHEET XLS_RANGE
+%token XLS_SHEET XLS_RANGE STOP_ON_ERROR
 %left COMMA
 %left EQUAL_EQUAL EXCLAMATION_EQUAL
 %left LESS GREATER LESS_EQUAL GREATER_EQUAL
@@ -836,6 +836,7 @@ steady_options : o_solve_algo
                | o_markowitz
                | o_maxit
                | o_nocheck
+               | o_stop_on_error
                ;
 
 check : CHECK ';'
@@ -2483,6 +2484,7 @@ o_median : MEDIAN { driver.option_num("ms.median","1"); }
 o_regimes : REGIMES { driver.option_num("ms.regimes","1"); };
 o_regime : REGIME EQUAL INT_NUMBER { driver.option_num("ms.regime",$3); };
 o_data_obs_nbr : DATA_OBS_NBR EQUAL INT_NUMBER { driver.option_num("ms.forecast_data_obs",$3); };
+o_stop_on_error: STOP_ON_ERROR EQUAL INT_NUMBER { driver.option_num("steady.stop_on_eror",$3); };
 
 range : symbol ':' symbol
         {

preprocessor/DynareFlex.ll

@@ -451,6 +451,7 @@ string eofbuff;
 <DYNARE_STATEMENT>deflator {return token::DEFLATOR;}
 <DYNARE_STATEMENT>growth_factor {return token::GROWTH_FACTOR;}
 <DYNARE_STATEMENT>cova_compute {return token::COVA_COMPUTE;}
+<DYNARE_STATEMENT>stop_on_error {return token::STOP_ON_ERROR;}
 
 <DYNARE_STATEMENT>[\$][^$]*[\$] {
   strtok(yytext+1, "$");