diff --git a/libs/libnamemanager/src/base/module_name_map.cpp b/libs/libnamemanager/src/base/module_name_map.cpp
index bcb1c23c2..7cceb6506 100644
--- a/libs/libnamemanager/src/base/module_name_map.cpp
+++ b/libs/libnamemanager/src/base/module_name_map.cpp
@@ -26,6 +26,14 @@ std::string ModuleNameMap::name(const std::string& tag) const {
   return result->second;
 }
 
+std::vector<std::string> ModuleNameMap::tags() const {
+  std::vector<std::string> keys;
+  for (auto const& element : tag2names_) {
+    keys.push_back(element.first);
+  }
+  return keys;
+}
+
 int ModuleNameMap::set_tag_to_name_pair(const std::string& tag, const std::string& name) {
   /*  tagA <--x--> nameA
    *        | 
@@ -45,6 +53,7 @@ int ModuleNameMap::set_tag_to_name_pair(const std::string& tag, const std::strin
   tag2names_[tag] = name;
   /* Clean up */
   name2tags_.erase(name);
+  return CMD_EXEC_SUCCESS;
 }
 
 } /* end namespace openfpga */
diff --git a/libs/libnamemanager/src/base/module_name_map.h b/libs/libnamemanager/src/base/module_name_map.h
index d2c921b81..c9bcf1c81 100644
--- a/libs/libnamemanager/src/base/module_name_map.h
+++ b/libs/libnamemanager/src/base/module_name_map.h
@@ -5,6 +5,7 @@
  * Include header files required by the data structure definition
  *******************************************************************/
 #include <string>
+#include <vector>
 #include <map>
 
 /* Begin namespace openfpga */
@@ -17,6 +18,8 @@ class ModuleNameMap {
  public: /* Public accessors */
   /** @brief Get customized name with a given tag */
   std::string name(const std::string& tag) const;
+  /** @brief return a list of all the current keys */
+  std::vector<std::string> tags() const;
 
  public: /* Public mutators */
   /** @brief Create the one-on-one mapping between an built-in name and a customized name. Return 0 for success, return 1 for fail */
diff --git a/libs/libnamemanager/src/io/read_xml_module_name_map.cpp b/libs/libnamemanager/src/io/read_xml_module_name_map.cpp
index 3b93a543e..3b1f76ed2 100644
--- a/libs/libnamemanager/src/io/read_xml_module_name_map.cpp
+++ b/libs/libnamemanager/src/io/read_xml_module_name_map.cpp
@@ -30,10 +30,10 @@ static int read_xml_module_name_binding(pugi::xml_node& xml_binding,
                                 const pugiutil::loc_data& loc_data,
                                 ModuleNameMap& module_name_map) {
   std::string default_name =
-    get_attribute(xml_port, XML_MODULE_NAME_ATTRIBUTE_DEFAULT, loc_data)
+    get_attribute(xml_binding, XML_MODULE_NAME_ATTRIBUTE_DEFAULT, loc_data)
       .as_string();
   std::string given_name =
-    get_attribute(xml_port, XML_MODULE_NAME_ATTRIBUTE_GIVEN, loc_data)
+    get_attribute(xml_binding, XML_MODULE_NAME_ATTRIBUTE_GIVEN, loc_data)
       .as_string();
 
   return module_name_map.set_tag_to_name_pair(default_name, given_name);