Rewrote the error message issued when the prefilter option in used while the...

Rewrote the error message issued when the prefilter option in used while the steady state of the observed variables is non zero (introduced in commit d82252e8).

matlab/dynare_estimation_init.m

@@ -85,7 +85,7 @@ if options_.lik_init == 1
     if isempty(options_.qz_criterium)
         options_.qz_criterium = 1-1e-6;
     elseif options_.qz_criterium > 1-eps
-        error(['estimation: option qz_criterium is too large for estimating ' ...
+        error(['Estimation: option qz_criterium is too large for estimating ' ...
                'a stationary model. If your model contains unit roots, use ' ...
                'option diffuse_filter'])
     end
@@ -274,7 +274,7 @@ end
 
 if isempty(estim_params_)% If estim_params_ is empty (e.g. when running the smoother on a calibrated model)
     if ~options_.smoother
-        error('ESTIMATION: the ''estimated_params'' block is mandatory (unless you are running a smoother)')
+        error('Estimation: the ''estimated_params'' block is mandatory (unless you are running a smoother)')
     end
     xparam1 = [];
     bayestopt_.lb = [];
@@ -494,10 +494,12 @@ else
     options_.noconstant = 0;
     % If the data are prefiltered then there must not be constants in the
     % measurement equation of the DSGE model or in the DSGE-VAR model.
-    if options_.prefilter == 1
-        fprintf('\nestimation_init: You have specified the option "prefilter" to demean your data,\n')
-        fprintf('estimation_init: but your observation equations are not mean zero. Either change your observation\n')
-        fprintf('estimation_init: equation or drop the prefiltering.\n')
+    if options_.prefilter
+        skipline()
+        disp('You have specified the option "prefilter" to demean your data but the')
+        disp('steady state of of the observed variables is non zero.')
+        disp('Either change the measurement equations, by centering the observed')
+        disp('variables in the model block, or drop the prefiltering.')
         error('The option "prefilter" is inconsistent with the non-zero mean measurement equations in the model.')
     end
 end