diff --git a/version2.0/main.cpp b/version2.0/main.cpp
index f1769ca..1fb4f88 100644
--- a/version2.0/main.cpp
+++ b/version2.0/main.cpp
@@ -59,6 +59,7 @@ int main()
 			resource.delete_all_source();
 			lexer.delete_all_tokens();
 			parser.delete_all_elements();
+			symtable.set_scope_clear();
 			std::cout<<">>[Delete] complete."<<std::endl;
 		}
 		else if(command=="lib")
diff --git a/version2.0/nasal_lexer.h b/version2.0/nasal_lexer.h
index d99adf0..27704ef 100644
--- a/version2.0/nasal_lexer.h
+++ b/version2.0/nasal_lexer.h
@@ -490,7 +490,7 @@ class nasal_lexer
 					detail_token_list.push_back(detail_token);
 				}
 			}
-			std::cout<<">>[Detail-Lexer] complete generating. "<<error<<" error(s)."<<std::endl;
+			std::cout<<">>[Detail-lexer] complete generating. "<<error<<" error(s)."<<std::endl;
 			return;
 		}
 		int get_error()