#define RERR_SYNTAX 1 /* syntax or usage error */
#define RERR_PROTOCOL 2 /* protocol incompatibility */
#define RERR_FILESELECT 3 /* errors selecting input/output files, dirs */
-#define RERR_NOSUPPORT 4 /* requested action not supported */
+#define RERR_UNSUPPORTED 4 /* requested action not supported */
#define RERR_SOCKETIO 10 /* error in socket IO */
#define RERR_FILEIO 11 /* error in file IO */