diff --git a/forward.lua b/forward.lua
index e20abaf2918ef25b0daaed86f3360a5be3a06824..af29637fc4420e19c9c1b6ba713a36e9cc1cdb26 100644
--- a/forward.lua
+++ b/forward.lua
@@ -93,6 +93,7 @@ print("number of utterances: " .. validSet.nData)
 
 
 for i = 1,validSet.nData do
+	print(i)
 	local nbVoicedFrames=0
 	local score=0
 	target=validSet:get_label(c)
diff --git a/saveVAD.lua b/saveVAD.lua
index 0cb36e6c381324792aef56dbe7ce72f4e0d18029..ce85d85eb05ae9e6dd620dbc92617e92e0c02143 100644
--- a/saveVAD.lua
+++ b/saveVAD.lua
@@ -1,4 +1,4 @@
--- use: savePaths listfile_real listfile_attack outputfile
+-- use: torch saveVAD.lua listfile_real listfile_attack outputfile
 
 vad_table={}
 for l in io.lines(arg[1]) do
diff --git a/speech_dataset.lua b/speech_dataset.lua
index 5d98df66ac2247c3f91254887e6e7a609691f0a3..a6aaedbbb06688091aba88e3fb3fe4dc67d73bc6 100644
--- a/speech_dataset.lua
+++ b/speech_dataset.lua
@@ -13,7 +13,7 @@ function SpeechDataset:__init(config)
     self.label=torch.load(config.labelfile);
     print("data loaded")
     self.path = nil
-    if config.pathfile ~= nil then
+    if config.pathfile ~= "" then
         self.path = torch.load(config.pathfile)
     end
 
@@ -224,7 +224,7 @@ end
 
 function SpeechDataset:get_path(k)
     if self.path == nil then
-        return nil
+        return ""
     end
 	return self.path[self.map[k][1]]
 end