diff --git a/Errors.md b/Errors.md
index e38f020..98cebf3 100644
--- a/Errors.md
+++ b/Errors.md
@@ -3,4 +3,6 @@ Some errors that can be thrown by SESSINIT property #4 and potentially other pla
 | Number | Name | Error message | Notes |
 | --- | --- | --- | --- |
 | 1 | NAK_BAD_USER | TBD | |
-| 2 | NAK_MAX_ORDINARY | TBD | |
\ No newline at end of file
+| 2 | NAK_MAX_ORDINARY | TBD | |
+| 3 | NAK_MAX_PRIORITY | TBD | |
+| 4 | | | AssertionError! (Crash?) |
\ No newline at end of file