diff -ur v13/snddiv.py v14/snddiv.py
--- v13/snddiv.py	2022-05-02 18:32:46.842678228 +0900
+++ v14/snddiv.py	2022-05-03 00:56:16.855661773 +0900
@@ -154,7 +154,6 @@
 
 		def get_dat():
 			if e.fin:
-			#if e.sec <= fin_sec if reverse else e.sec >= fin_sec:
 				return None
 
 			if cache:
@@ -171,7 +170,7 @@
 				e.fin = ( e.sec <= 0 )
 			else:
 				sec_f = e.sec
-				sec_t = min( e.sec + step_sec, fin_sec )
+				sec_t = min( e.sec + step_sec, last_sec )
 				b = get_dat_from_to( sec_f, sec_t )
 				e.sec = sec_t
 				e.fin = ( e.sec >= last_sec )
@@ -276,7 +275,7 @@
 	cache = a.is_pop( '-cache' )
 	filename_mp3 = a.pop()
 	if not filename_mp3:
-		dbg.help_exit( '[-g] [-S sudo_passwd] [-silent] filename_mp3' )
+		dbg.help_exit( '[-g] [-S sudo_passwd] [-silent] [-cache] filename_mp3' )
 
 	snd_ut.silent = silent
 	dbg_out = lambda s, tail='\n': None if silent else dbg.out