diff --git a/R128.au3 b/R128.au3
index d4a380ab37942193fa69f2a695bb836f17aed3e8..30a7c79c5d12a7caa0b81f449b0c92af6c5558a2 100644
--- a/R128.au3
+++ b/R128.au3
@@ -2,7 +2,7 @@
 #AutoIt3Wrapper_Icon=Icons\peakmeter.ico
 #AutoIt3Wrapper_Res_Comment=Measure loudness with ffmpeg according to R128.
 #AutoIt3Wrapper_Res_Description=Measure loudness with ffmpeg according to R128.
-#AutoIt3Wrapper_Res_Fileversion=1.1.0.12
+#AutoIt3Wrapper_Res_Fileversion=1.1.0.13
 #AutoIt3Wrapper_Res_Fileversion_AutoIncrement=y
 #AutoIt3Wrapper_Res_CompanyName=Norddeutscher Rundfunk
 #AutoIt3Wrapper_Res_LegalCopyright=Conrad Zelck
@@ -92,8 +92,9 @@ If @extended > 0 Then
 	$iMonoCount = @extended
 	If $iMonoCount = $aChannels[0] Then
 		$iLayout = $eMONO
+		If Mod($iMonoCount, 2) <> 0 Then $iLayout = 0 ; uneven counter
 	EndIf
-	ConsoleWrite("Monofiles: " & @extended & @CRLF)
+	ConsoleWrite("Monofiles: " & $iMonoCount & @CRLF)
 EndIf
 StringReplace($sChannels, "2", "2") ; just to get the count
 If @extended > 0 Then
@@ -101,7 +102,7 @@ If @extended > 0 Then
 	If $iStereoCount = $aChannels[0] Then
 		$iLayout = $eSTEREO
 	EndIf
-	ConsoleWrite("Stereofiles: " & @extended & @CRLF)
+	ConsoleWrite("Stereofiles: " & $iStereoCount & @CRLF)
 EndIf
 Local $iMeasuringPairs = 0
 Switch $iLayout
@@ -113,7 +114,7 @@ Switch $iLayout
 		ConsoleWrite("All STEREO" & @CRLF)
 	Case Else
 		ConsoleWrite("UNDEFINED Layout" & @CRLF)
-		MsgBox($MB_TOPMOST, "Error", "Track layout is undefined." & @CRLF & "Application exits.")
+		MsgBox($MB_TOPMOST, "Error", "Track layout is undefined." & @CRLF & @CRLF & "Application exits.")
 		Exit
 EndSwitch
 ConsoleWrite("Pairs for measuring: " & $iMeasuringPairs & @CRLF)
diff --git a/README.md b/README.md
index a3d6ace3422c3a6b3e4116d8fdb2712b9b2a2037..014b25c8d91e1c30ec74ac804ff33ea24b9db2f5 100644
--- a/README.md
+++ b/README.md
@@ -3,4 +3,5 @@ This application measures loudness according to EBU R128 with ffmpeg.
 
 You can send video or audio files to the app.
 Channel layout inside video can be mono or stereo. But mono files will temporarily merge to a stereo file at first.
+If number of mono tracks is uneven it will return an error.
 Temporary output.wav is exported to %temp% in 24bit 48kHz.
\ No newline at end of file