diff --git a/tool/gridmanager/gridmanager.cpp b/tool/gridmanager/gridmanager.cpp
index 8efcac8..8d1f3ca 100644
--- a/tool/gridmanager/gridmanager.cpp
+++ b/tool/gridmanager/gridmanager.cpp
@@ -621,21 +621,21 @@ void data_output(const std::vector<std::string> &cmd_units)
         copy_str[i - 1] = cmd_units[i];
     }
 
-    meshdata curr_data;
+    meshdata *data_ptr;
     if (copy_str[0] == "enable")
     {
         for (size_t i = 1; i < copy_str.size(); i++)
         {
-            curr_data = rg.get_data(copy_str[i]);
-            curr_data.output_ok_ = true;
+            data_ptr = rg.get_data_ptr(copy_str[i]);
+            data_ptr->output_ok_ = true;
         }
     }
     else if (copy_str[0] == "disable")
     {
         for (size_t i = 1; i < copy_str.size(); i++)
         {
-            curr_data = rg.get_data(copy_str[i]);
-            curr_data.output_ok_ = false;
+            data_ptr = rg.get_data_ptr(copy_str[i]);
+            data_ptr->output_ok_ = false;
         }
     }
     else throw std::runtime_error("data-output: invalid operation type.");
@@ -653,7 +653,7 @@ void data_rename(const std::vector<std::string> &cmd_units)
         copy_str[i - 1] = cmd_units[i];
     }
 
-    meshdata curr_data = rg.get_data(copy_str[0]);
+    meshdata &curr_data = rg.get_data(copy_str[0]);
     curr_data.name_ = copy_str[1];
     return;
 }
@@ -693,13 +693,13 @@ void get_stats(const std::vector<std::string> &cmd_units)
         copy_str[i - 1] = cmd_units[i];
     }
 
-    meshdata curr_data;
+    meshdata *data_ptr;
     std::vector<double> stats;
     for (size_t i = 0; i < copy_str.size(); i++)
     {
-        curr_data = rg.get_data(copy_str[i]);
-        curr_data.show_info();
-        curr_data.show_stats();
+        data_ptr = rg.get_data_ptr(copy_str[i]);
+        data_ptr->show_info();
+        data_ptr->show_stats();
     }
     return;
 }