--- openflow-2012-09-17.h	2015-07-23 09:54:17.436479374 -0700
+++ openflow-2012-09-28.h	2015-07-23 09:54:17.440479374 -0700
@@ -1687,6 +1687,7 @@
                                    idle/hard timeout. */
     OFPFMFC_BAD_COMMAND  = 6,   /* Unsupported or unknown command. */
     OFPFMFC_BAD_FLAGS    = 7,   /* Unsupported or unknown flags. */
+    OFPFMFC_CANT_SYNC    = 8,   /* Problem in table synchronisation. */
 };
 
 /* ofp_error_msg 'code' values for OFPET_GROUP_MOD_FAILED.  'data' contains