diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -219,3 +219,8 @@
 * Twenty-fourth version. Fixed issue with being not compiled because of the unsupported operator (<$>) for GHC 7.8.4. Added possibilities to
 work with DobutokO.Sound.Functional module function f more explicitly by three functions 'maybeFFromStrVec', 'fVecCoefs' and 'showFFromStrVec'. Provided
 information about examples in the GitHub repository dobutokO2-examples. Some code and documentation improvements. 
+
+## 0.24.1.0 -- 2020-04-04
+
+* Twenty-fourth version revised A. Fixed issue with being not compiled because of the mapM_ applied for list and not vector for GHC 7.8.4.
+Some code and documentation improvements. 
diff --git a/DobutokO/Sound/Executable.hs b/DobutokO/Sound/Executable.hs
--- a/DobutokO/Sound/Executable.hs
+++ b/DobutokO/Sound/Executable.hs
@@ -121,7 +121,7 @@
 
 dobutokO2H80 :: Bool -> String -> FilePath -> IO ()
 dobutokO2H80 exist2 args file = dobutokO2H8G exist2 args file  >>= \case
-    (ExitSuccess, path8v) -> mapM_ removeFile path8v
+    (ExitSuccess, path8v) -> V.mapM_ removeFile path8v
     _           -> return ()
 {-# INLINE dobutokO2H80 #-}
 
@@ -184,7 +184,7 @@
 
 dobutokO2H820 :: Bool -> String -> FilePath -> IO ()
 dobutokO2H820 exist2 ys file = dobutokO2H82G exist2 ys file  >>= \case
-    (ExitSuccess, path8v) -> mapM_ removeFile path8v
+    (ExitSuccess, path8v) -> V.mapM_ removeFile path8v
     _           -> return ()
 {-# INLINE dobutokO2H820 #-}
 
diff --git a/DobutokO/Sound/Functional.hs b/DobutokO/Sound/Functional.hs
--- a/DobutokO/Sound/Functional.hs
+++ b/DobutokO/Sound/Functional.hs
@@ -968,9 +968,9 @@
 
 -- | Experimental 'show' for @f::Double -> Vector (Double,Double)@ that is used only for visualisation. It is correct only with 'maybeFFromStrVec' or
 -- equivalent function. Because the shape of the @f@ is known the function can be defined.
+-- 
+-- > showFFromStrVec (-1) 440 "[(25.358,0.3598),(489.35,0.4588962),(795.35,0.6853)]"
 -- > 
--- > showFFromStrVec (-1) 440 "[(25.358,0.3598),(489.35,0.4588962),(795.35,0.6853)]" 
--- >
 -- > "(440.00,(\t -> <(0.05763181818181818 * t, 0.3598),(1.112159090909091 * t, 0.4588962),(1.8076136363636364 * t, 0.6853)>))"
 -- 
 showFFromStrVec :: Int -> Double -> String -> String
diff --git a/README.markdown b/README.markdown
--- a/README.markdown
+++ b/README.markdown
@@ -229,5 +229,5 @@
                 --------------------
 
 Starting from the 0.24.0.0 version, you can refer to examples in the GitHub special
-repository (https://github.com/OleksandrZhabenko/dobutokO2-examples/)[https://github.com/OleksandrZhabenko/dobutokO2-examples/]
+repository (https://github.com/OleksandrZhabenko/dobutokO2-examples/)
 
diff --git a/dobutokO2.cabal b/dobutokO2.cabal
--- a/dobutokO2.cabal
+++ b/dobutokO2.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                dobutokO2
-version:             0.24.0.0
+version:             0.24.1.0
 synopsis:            A program and a library to create experimental music from a mono audio and a Ukrainian text
 description:         It can also create a timbre for the notes. Uses SoX inside.
 homepage:            https://hackage.haskell.org/package/dobutokO2