diff --git a/runtime/doc/message.txt b/runtime/doc/message.txt
index d41915e..65c222d 100644
--- a/runtime/doc/message.txt
+++ b/runtime/doc/message.txt
@@ -1,4 +1,4 @@
-*message.txt*   For Vim version 7.4.  Last change: 2016 Apr 14
+*message.txt*   For Vim version 7.4.  Last change: 2016 Jul 14
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -673,6 +673,12 @@
 have the same number, which causes various problems.  You might want to exit
 Vim and restart it.
 
+							*E931*  >
+  Buffer cannot be registered
+
+Out of memory or a duplicate buffer number.  May habben after W14.  Looking up
+a buffer will not always work, better restart Vim.
+
 							*E296* *E297*  >
   Seek error in swap file write
   Write error in swap file