diff --git a/HISTORY b/HISTORY
index 5cf3f2a..3fee137 100755
--- a/HISTORY
+++ b/HISTORY
@@ -1,3 +1,7 @@
+Jun. 21 2016
+Added lambda tracing
+Improved error prompting for wrong function reaching
+
 Jun. 17 2016
 Improved UTF8 string input/output on Windows
 
@@ -67,10 +71,10 @@ Fixed a cannot RETURN bug from a FOR loop in a sub routine
 Fixed a memory leak with referenced data in a variable argument list
 
 Mar. 15 2016
-Improved error promption of array manipulation
+Improved error prompting of array manipulation
 
 Mar. 11 2016
-Improved error promption
+Improved error prompting
 
 Mar. 9 2016
 Improved overridden function invoking
@@ -185,7 +189,7 @@ Refactored initial reference count
 Jan. 26 2016
 Added an mb_gc function
 Added a SET_IMPORTING_DIRS statement to the shell
-Added friendly error promption when memory overflow
+Added friendly error prompting when memory overflow
 Added source file information to stepped handler
 Fixed a wrong argument processing bug with a variable argument list
 Fixed a wrong hash bug with string object