diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,3 +39,7 @@
 ## 0.3.0.0 -- 2020-01-28
 
 * Third version. Changed the dependency bounds. Added the support for informational messages. Some documentation improvements.
+
+## 0.3.1.0 -- 2020-01-28
+
+* Third version revised A. Changed errors to exceptions. Some documentation improvements.
diff --git a/MMSyn7l.hs b/MMSyn7l.hs
--- a/MMSyn7l.hs
+++ b/MMSyn7l.hs
@@ -2,7 +2,6 @@
 -- Module      :  MMSyn7l
 -- Copyright   :  (c) OleksandrZhabenko 2020
 -- License     :  MIT
---
 -- Stability   :  Experimental
 -- Maintainer  :  olexandr543@yahoo.com
 --
@@ -18,6 +17,7 @@
 import qualified Data.Vector as V
 import Control.Exception (onException)
 import CaseBi (getBFst')
+import Control.Exception.FinalException
 
 -- | Function 'changeVolume' is used to change the amplitude of the sound. 
 -- For the proper proceeding you specify a @String@, which consists of 4 
@@ -130,7 +130,7 @@
               coefA = 0.0001 * fromIntegral (read ys::Int)
               ratio = 1.0 + (delta / ampl) * coefA
           SB1.volS file (ratio * ampl)
-    else error "SoXBasics1: the volS function gave a strange result!"
+    else catchEnd (StrangeAnswer "SoXBasics1" "volS")
 
 -- | Function 'changeVol4' is used internally in the 'specifyVol' in case of working with the minimum amplitude.
 changeVol4 :: FilePath -> (String, String) -> IO ()
@@ -147,5 +147,5 @@
               coefA = 0.0001 * fromIntegral (read ys::Int)
               ratio = 1.0 + (delta / ampl) * coefA
           SB1.volS file (ratio * ampl)
-    else error "SoXBasics1: the volS function gave a strange result!"
+    else catchEnd (StrangeAnswer "SoXBasics1" "volS")
       
diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -2,7 +2,6 @@
 -- Module      :  Main
 -- Copyright   :  (c) OleksandrZhabenko 2020
 -- License     :  MIT
---
 -- Stability   :  Experimental
 -- Maintainer  :  olexandr543@yahoo.com
 --
@@ -45,7 +44,7 @@
       putStrLn "given sound representations. If not specified, the program modifies the amplitudes for all non-pause Ukrainian sounds representations."
       putStrLn ""
     ("-v":_)  -> do
-      putStrLn "mmsyn7l version: 0.3.0.0"
+      putStrLn "mmsyn7l version: 0.3.1.0"
       putStrLn ""
     _         ->  do
       putStrLn "Now you can change the amplitude of the needed sound representations of the Ukrainian sounds (or something similar). "
diff --git a/mmsyn7l.cabal b/mmsyn7l.cabal
--- a/mmsyn7l.cabal
+++ b/mmsyn7l.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                mmsyn7l
-version:             0.3.0.0
+version:             0.3.1.0
 synopsis:            Modifies the amplitudes of the Ukrainian sounds representations created by mmsyn7ukr package.
 description:         A program and a library to modify the amplitudes of the Ukrainian sounds representations created by mmsyn7ukr package or somehow otherwise.
 homepage:            https://hackage.haskell.org/package/mmsyn7l
@@ -20,7 +20,7 @@
   exposed-modules:     Main, MMSyn7l
   -- other-modules:
   -- other-extensions:
-  build-depends:       base >=4.7 && <4.14, mmsyn7ukr >=0.10 && <1, vector >=0.11 && <0.14, mmsyn2 >=0.1.7 && <1
+  build-depends:       base >=4.7 && <4.14, mmsyn7ukr >=0.11 && <1, vector >=0.11 && <0.14, mmsyn2 >=0.1.7 && <1
   -- hs-source-dirs:
   default-language:    Haskell2010
 
@@ -28,6 +28,6 @@
   main-is:             Main.hs
   -- other-modules:
   -- other-extensions:
-  build-depends:       base >=4.7 && <4.14, mmsyn7ukr >=0.10 && <1, vector >=0.11 && <0.14, mmsyn2 >=0.1.7 && <1
+  build-depends:       base >=4.7 && <4.14, mmsyn7ukr >=0.11 && <1, vector >=0.11 && <0.14, mmsyn2 >=0.1.7 && <1
   -- hs-source-dirs:
   default-language:    Haskell2010