diff --git a/code/nel/samples/3d/cluster_viewer/main.cpp b/code/nel/samples/3d/cluster_viewer/main.cpp
index 431d9c2f6..7ca5b07a1 100644
--- a/code/nel/samples/3d/cluster_viewer/main.cpp
+++ b/code/nel/samples/3d/cluster_viewer/main.cpp
@@ -209,7 +209,6 @@ int main()
 	double rGlobalTime = 0;
 	double rOldGlobalTime = 0;
 	double rDeltaTime = 0;
-	double rMoveTime = 0;
 
 	vector<SDispCS> DispCS;
 
@@ -430,7 +429,7 @@ int main()
 			{
 				nSelected--;
 				if(nSelected == -1)
-					nSelected = DispCS.size()-1;
+					nSelected = (sint32)DispCS.size()-1;
 			}
 			if (CNELU::AsyncListener.isKeyPushed (KeyS))
 			{
diff --git a/code/nel/samples/3d/nel_qt/graphics_viewport.cpp b/code/nel/samples/3d/nel_qt/graphics_viewport.cpp
index b116ebad1..0914c483d 100644
--- a/code/nel/samples/3d/nel_qt/graphics_viewport.cpp
+++ b/code/nel/samples/3d/nel_qt/graphics_viewport.cpp
@@ -92,7 +92,7 @@ void CGraphicsViewport::init(CGraphicsConfig *graphicsConfig)
 	nlassert(m_Driver);
 
 	// initialize the window with config file values
-	m_Driver->setDisplay((void *)winId(), NL3D::UDriver::CMode(width(), height(), 32));
+	m_Driver->setDisplay(winId(), NL3D::UDriver::CMode(width(), height(), 32));
 
 	// register config callbacks
 	connect(m_GraphicsConfig, SIGNAL(onBackgroundColor(NLMISC::CRGBA)), 
diff --git a/code/nel/samples/misc/configfile/main.cpp b/code/nel/samples/misc/configfile/main.cpp
index 77a3a859f..f5a3fd472 100644
--- a/code/nel/samples/misc/configfile/main.cpp
+++ b/code/nel/samples/misc/configfile/main.cpp
@@ -58,7 +58,7 @@ void var12Callback (CConfigFile::CVar &var)
 // the configfile
 CConfigFile cf;
 
-int main (int argc, char **argv)
+int main (int /* argc */, char ** /* argv */)
 {
 
 	// look at the debug example
@@ -87,14 +87,17 @@ int main (int argc, char **argv)
 
 	// get the value of var1 as int
 	int var1 = cf.getVar ("var1").asInt();
+	nlinfo("var1 (int) = %d", var1);
 
 	// get the value of var1 as double, in this case, a conversion from int
 	// to double will be done
 	double var2 = cf.getVar ("var1").asDouble();
+	nlinfo("var1 (double) = %lf", var2);
 
 	// get the value of var2 as int, in this case, a conversion from string
 	// to int will be done
 	int var3 = cf.getVar ("var2").asInt();
+	nlinfo("var2 = %d", var3);
 
 	// if the variable is an array of values, you can access them putting the
 	// index of the variable you want. Example, get and print all value of var12:
@@ -111,6 +114,7 @@ int main (int argc, char **argv)
 	{
 		// try to access an unknown variable
 		int val = cf.getVar ("unknown_variable").asInt();
+		nlinfo("unknown_variable = %d", val);
 	}
 	catch (EConfigFile &e)
 	{
diff --git a/code/nel/samples/misc/debug/main.cpp b/code/nel/samples/misc/debug/main.cpp
index 347f01fbc..9d17d158c 100644
--- a/code/nel/samples/misc/debug/main.cpp
+++ b/code/nel/samples/misc/debug/main.cpp
@@ -22,7 +22,7 @@
 
 using namespace NLMISC;
 
-int main (int argc, char **argv)
+int main (int /* argc */, char ** /* argv */)
 {
 	// all debug functions have different behaviors in debug and in release mode.
 	// in general, in debug mode, all debug functions are active, they display
diff --git a/code/nel/samples/misc/log/main.cpp b/code/nel/samples/misc/log/main.cpp
index 78b6a10b9..76d4fce95 100644
--- a/code/nel/samples/misc/log/main.cpp
+++ b/code/nel/samples/misc/log/main.cpp
@@ -40,7 +40,7 @@ CFileDisplayer fd("main.log",true);
 // Windows, it does nothing on other systems.
 CMsgBoxDisplayer mbd;
 
-int main (int argc, char **argv)
+int main (int /* argc */, char ** /* argv */)
 {
 	// create a logger; it's an information logger.
 	CLog logger (CLog::LOG_INFO);
diff --git a/code/nel/samples/net/chat/kbhit.cpp b/code/nel/samples/net/chat/kbhit.cpp
index 50c8f2c65..261b203e9 100644
--- a/code/nel/samples/net/chat/kbhit.cpp
+++ b/code/nel/samples/net/chat/kbhit.cpp
@@ -71,7 +71,8 @@ int getch()
 		peek_character = -1;
 		return ch;
 	}
-	read(STDIN_FILENO,&ch,1);
+	if (read(STDIN_FILENO,&ch,1) != 1)
+		nlwarning("Can't read keyboard");
 	return ch;
 }
 
diff --git a/code/nel/samples/net/login_system/client.cpp b/code/nel/samples/net/login_system/client.cpp
index 532b1a22c..408baea65 100644
--- a/code/nel/samples/net/login_system/client.cpp
+++ b/code/nel/samples/net/login_system/client.cpp
@@ -117,8 +117,11 @@ int main (int argc, char **argv)
 	sint32 sid = ConfigFile.getVar("ShardId").asInt();
 	if(sid == 0)
 	{
-		printf("Enter the SharId you want to connect to: ");
-		scanf("%d", sid);
+		printf("Enter the ShardId you want to connect to: ");
+		if (scanf("%d", &sid) != 1)
+		{
+			nlwarning("Can't parse ShardId");
+		}
 	}
 
 	/* Try to connect to the shard number 0 in the list.
diff --git a/code/nel/samples/net/udp/bench_service.cpp b/code/nel/samples/net/udp/bench_service.cpp
index f76433ea8..dc631f80c 100644
--- a/code/nel/samples/net/udp/bench_service.cpp
+++ b/code/nel/samples/net/udp/bench_service.cpp
@@ -196,7 +196,7 @@ void cbInit (CMessage &msgin, TSockId from, CCallbackNetBase &netbase)
 	msgout.serial (session);
 	CallbackServer->send (msgout, from);
 
-	Clients.push_back(CClient(from, session, connectionName));
+	Clients.push_back(CClient(from, (uint32)session, connectionName));
 	nlinfo ("Added client TCP %s, session %x", from->asString().c_str(), session);
 }
 
@@ -517,7 +517,7 @@ void handleReceivedPong (CClient *client, sint64 pongTime)
 	memcpy (msgin.bufferToFill (currentsize), CurrentInMsg->userDataR(), currentsize);
 
 	// Read the header
-	uint8 mode;
+	uint8 mode = 0;
 	msgin.serial (mode);
 
 	if (mode == 0)
diff --git a/code/nel/samples/net/udp/client.cpp b/code/nel/samples/net/udp/client.cpp
index 9079d8109..51ed287ce 100644
--- a/code/nel/samples/net/udp/client.cpp
+++ b/code/nel/samples/net/udp/client.cpp
@@ -380,13 +380,13 @@ int main( int argc, char **argv )
 				CMemStream msgin( true );
 				memcpy (msgin.bufferToFill (psize), packet, psize);
 
-				sint64 t;
+				sint64 t = 0;
 				msgin.serial (t);
 
-				uint32 p;
+				uint32 p = 0;
 				msgin.serial (p);
 
-				uint32 b;
+				uint32 b = 0;
 				msgin.serial (b);
 	
 				// I received a ping, send a pong
diff --git a/code/nel/samples/pacs/main.cpp b/code/nel/samples/pacs/main.cpp
index b04a743db..256acf9b3 100644
--- a/code/nel/samples/pacs/main.cpp
+++ b/code/nel/samples/pacs/main.cpp
@@ -376,7 +376,7 @@ int main ()
 #ifdef NL_OS_WINDOWS
 		::MessageBox (NULL, e.what(), "Test collision move", MB_OK|MB_ICONEXCLAMATION);
 #else // NL_OS_WINDOWS
-		printf (e.what());
+		printf ("%s\n", e.what());
 #endif // NL_OS_WINDOWS
 	}
 
diff --git a/code/nel/tools/misc/bnp_make/main.cpp b/code/nel/tools/misc/bnp_make/main.cpp
index 952616aa9..bde3f2c96 100644
--- a/code/nel/tools/misc/bnp_make/main.cpp
+++ b/code/nel/tools/misc/bnp_make/main.cpp
@@ -79,16 +79,44 @@ struct BNPHeader
 		if (f == NULL) return false;
 
 		uint32 nNbFile = (uint32)Files.size();
-		fwrite (&nNbFile, sizeof(uint32), 1, f);
+		if (fwrite (&nNbFile, sizeof(uint32), 1, f) != 1)
+		{
+			fclose(f);
+			return false;
+		}
 		for (uint32 i = 0; i < nNbFile; ++i)
 		{
 			uint8 nStringSize = (uint8)Files[i].Name.size();
-			fwrite (&nStringSize, 1, 1, f);
-			fwrite (Files[i].Name.c_str(), 1, nStringSize, f);
-			fwrite (&Files[i].Size, sizeof(uint32), 1, f);
-			fwrite (&Files[i].Pos, sizeof(uint32), 1, f);
+			if (fwrite (&nStringSize, 1, 1, f) != 1)
+			{
+				fclose(f);
+				return false;
+			}
+
+			if (fwrite (Files[i].Name.c_str(), 1, nStringSize, f) != nStringSize)
+			{
+				fclose(f);
+				return false;
+			}
+
+			if (fwrite (&Files[i].Size, sizeof(uint32), 1, f) != 1)
+			{
+				fclose(f);
+				return false;
+			}
+
+			if (fwrite (&Files[i].Pos, sizeof(uint32), 1, f) != 1)
+			{
+				fclose(f);
+				return false;
+			}
+		}
+
+		if (fwrite (&OffsetFromBeginning, sizeof(uint32), 1, f) != 1)
+		{
+			fclose(f);
+			return false;
 		}
-		fwrite (&OffsetFromBeginning, sizeof(uint32), 1, f);
 
 		fclose (f);
 		return true;
@@ -103,29 +131,54 @@ struct BNPHeader
 		nlfseek64 (f, 0, SEEK_END);
 		uint32 nFileSize=CFile::getFileSize (filename);
 		nlfseek64 (f, nFileSize-sizeof(uint32), SEEK_SET);
+
 		uint32 nOffsetFromBegining;
-		fread (&nOffsetFromBegining, sizeof(uint32), 1, f);
-		if (nlfseek64 (f, nOffsetFromBegining, SEEK_SET) != 0)
+		if (fread (&nOffsetFromBegining, sizeof(uint32), 1, f) != 1)
+		{
+			fclose (f);
 			return false;
+		}
+
+		if (nlfseek64 (f, nOffsetFromBegining, SEEK_SET) != 0)
+		{
+			fclose (f);
+			return false;
+		}
 		
 		uint32 nNbFile;
 		if (fread (&nNbFile, sizeof(uint32), 1, f) != 1)
+		{
+			fclose (f);
 			return false;
+		}
+
 		for (uint32 i = 0; i < nNbFile; ++i)
 		{
 			uint8 nStringSize;
 			char sName[256];
 			if (fread (&nStringSize, 1, 1, f) != 1)
+			{
+				fclose (f);
 				return false;
+			}
 			if (fread (sName, 1, nStringSize, f) != nStringSize)
+			{
+				fclose (f);
 				return false;
+			}
 			sName[nStringSize] = 0;
 			BNPFile tmpBNPFile;
 			tmpBNPFile.Name = sName;
 			if (fread (&tmpBNPFile.Size, sizeof(uint32), 1, f) != 1)
+			{
+				fclose (f);
 				return false;
+			}
 			if (fread (&tmpBNPFile.Pos, sizeof(uint32), 1, f) != 1)
+			{
+				fclose (f);
 				return false;
+			}
 			Files.push_back (tmpBNPFile);
 		}
 
@@ -146,9 +199,11 @@ void append(const string &filename1, const string &filename2, uint32 sizeToRead)
 	if (f2 == NULL) { fclose(f1); return; }
 	
 	uint8 *ptr = new uint8[sizeToRead];
-	fread (ptr, sizeToRead, 1, f2);
-	fwrite (ptr, sizeToRead, 1, f1);
-	delete ptr;
+	if (fread (ptr, sizeToRead, 1, f2) != 1)
+		nlwarning("%s read error", filename2.c_str());
+	if (fwrite (ptr, sizeToRead, 1, f1) != 1)
+		nlwarning("%s write error", filename1.c_str());
+	delete [] ptr;
 	
 	fclose(f2);
 	fclose(f1);
@@ -216,10 +271,12 @@ void unpack (const string &dirName)
 		{
 			nlfseek64 (bnp, rBNPFile.Pos, SEEK_SET);
 			uint8 *ptr = new uint8[rBNPFile.Size];
-			fread (ptr, rBNPFile.Size, 1, bnp);
-			fwrite (ptr, rBNPFile.Size, 1, out);
+			if (fread (ptr, rBNPFile.Size, 1, bnp) != 1)
+				nlwarning("%s read error", filename.c_str());
+			if (fwrite (ptr, rBNPFile.Size, 1, out) != 1)
+				nlwarning("%s write error", filename.c_str());
 			fclose (out);
-			delete ptr;
+			delete [] ptr;
 		}
 	}
 	fclose (bnp);
diff --git a/code/nel/tools/misc/xml_packer/xml_packer.cpp b/code/nel/tools/misc/xml_packer/xml_packer.cpp
index 3e96f4615..c05b7590d 100644
--- a/code/nel/tools/misc/xml_packer/xml_packer.cpp
+++ b/code/nel/tools/misc/xml_packer/xml_packer.cpp
@@ -297,7 +297,11 @@ int main(int argc, char *argv[])
 					}
 					fclose(fp);
 					// set the file 'hidden'n use the plain old system command...
-					system(toString("attrib +h %s", indexFileName.c_str()).c_str());
+					sint res = system(toString("attrib +h %s", indexFileName.c_str()).c_str());
+					if (res)
+					{
+						nlwarning("attrib failed with return code %d", res);
+					}
 				}
 				else
 				{