Bug fix. Variables INFO or info may be matlab's structure (isnan cannot be applied on a structure).

matlab/extended_path.m

@@ -124,7 +124,7 @@ while (t<=sample_size)
             norme
             INFO
         end
-        if isnan(INFO)
+        if ~isstruct(INFO) && isnan(INFO)
             t = t-1;
             new_draw = 0;
         else

matlab/homotopic_steps.m

@@ -45,7 +45,7 @@ end
 if reduce_step
     step=step/1.5;
     [info,number_of_calls] = homotopic_steps(tdx,positive_var_indx,shocks,old_weight,step,init,number_of_calls);
-    if ~isnan(info)
+    if isstruct(info) && ~isnan(info.error)
         time = time+info.time;
         return
     else