diff --git a/code/nel/include/nel/net/message_recorder.h b/code/nel/include/nel/net/message_recorder.h
index 5874aca4c..92fee29fa 100644
--- a/code/nel/include/nel/net/message_recorder.h
+++ b/code/nel/include/nel/net/message_recorder.h
@@ -61,7 +61,7 @@ struct TMessageRecord
 	{
 		nlassert( stream.stringMode() );
 
-		uint32 len;
+		uint32 len = 0;
 		std::string s_event;
 		stream.serial( UpdateCounter );
 		if ( stream.isReading() )
diff --git a/code/nel/src/misc/eval_num_expr.cpp b/code/nel/src/misc/eval_num_expr.cpp
index 1bfad17eb..42298c1fa 100644
--- a/code/nel/src/misc/eval_num_expr.cpp
+++ b/code/nel/src/misc/eval_num_expr.cpp
@@ -632,6 +632,9 @@ CEvalNumExpr::TReturnState CEvalNumExpr::evalExpression (double &finalResult, TT
 		TOperator resultUnaryOp[InternalOperator];
 		vector<TOperator> resultUnaryOpSup;
 
+		// init table
+		for (uint i = 0; i < (uint)InternalOperator; ++i) resultUnaryOp[i] = NotOperator;
+
 		// Current value
 		double value;
 
diff --git a/code/nel/src/net/module_common.cpp b/code/nel/src/net/module_common.cpp
index 0133343dd..f16e1bfa9 100644
--- a/code/nel/src/net/module_common.cpp
+++ b/code/nel/src/net/module_common.cpp
@@ -212,8 +212,8 @@ namespace NLNET
 			{
 				// name is more deep, need to resurse
 				parts.erase(parts.begin());
-				CSString subName;
-				subName.join(reinterpret_cast<CVectorSString&>(parts), ".");
+				std::string subName;
+				join(parts, ".", subName);
 				sub->setParam(subName, value);
 			}
 			else
diff --git a/code/nel/src/pipeline/database_config.cpp b/code/nel/src/pipeline/database_config.cpp
index b326a2888..56369c902 100644
--- a/code/nel/src/pipeline/database_config.cpp
+++ b/code/nel/src/pipeline/database_config.cpp
@@ -53,7 +53,7 @@ bool CDatabaseConfig::init(const std::string &asset)
 	TPathString configPath = rootPath + "/database.cfg";
 	while (!CFile::fileExists(configPath))
 	{
-		int sep = CFile::getLastSeparator(rootPath);
+		std::string::size_type sep = CFile::getLastSeparator(rootPath);
 		if (sep == string::npos)
 			return false;
 
diff --git a/code/nel/src/pipeline/project_config.cpp b/code/nel/src/pipeline/project_config.cpp
index 995f92fd4..b292f033c 100644
--- a/code/nel/src/pipeline/project_config.cpp
+++ b/code/nel/src/pipeline/project_config.cpp
@@ -65,7 +65,7 @@ bool CProjectConfig::init(const std::string &asset, Flags flags, bool partial)
 	TPathString configPath = rootPath + "/nel.cfg";
 	while (!CFile::fileExists(configPath))
 	{
-		int sep = CFile::getLastSeparator(rootPath);
+		std::string::size_type sep = CFile::getLastSeparator(rootPath);
 		if (sep == string::npos)
 			return false;
 
@@ -82,7 +82,7 @@ bool CProjectConfig::init(const std::string &asset, Flags flags, bool partial)
 	
 	std::vector<TPathString> configRootPaths;
 	TPathString projectConfigPath;
-	uint32 projectConfigModification;
+	uint32 projectConfigModification = 0;
 	std::string projectName;
 	if (partial)
 	{
diff --git a/code/nel/tools/3d/object_viewer/located_target_dlg.cpp b/code/nel/tools/3d/object_viewer/located_target_dlg.cpp
index fb84877ad..7cb03426f 100644
--- a/code/nel/tools/3d/object_viewer/located_target_dlg.cpp
+++ b/code/nel/tools/3d/object_viewer/located_target_dlg.cpp
@@ -137,7 +137,7 @@ void CLocatedTargetDlg::OnRemoveTarget()
 		m_Targets.DeleteString(indexs[k] - k);
 		int l = m_AvailableTargets.AddString(utf8ToTStr(loc->getName()));
 	
-		m_AvailableTargets.SetItemData(l, (DWORD) loc);
+		m_AvailableTargets.SetItemData(l, (DWORD_PTR) loc);
 	}
 	UpdateData(FALSE);	
 	updateModifiedFlag();
diff --git a/code/nel/tools/misc/log_analyser/PlugInSelector.cpp b/code/nel/tools/misc/log_analyser/PlugInSelector.cpp
index 9a21a8df6..594942ddb 100644
--- a/code/nel/tools/misc/log_analyser/PlugInSelector.cpp
+++ b/code/nel/tools/misc/log_analyser/PlugInSelector.cpp
@@ -87,7 +87,7 @@ BOOL CPlugInSelector::OnInitDialog()
 }
 
 
-int getLastSeparator (const string &filename)
+std::string::size_type getLastSeparator (const string &filename)
 {
 	string::size_type pos = filename.find_last_of ('/');
 	if (pos == string::npos)
diff --git a/code/nel/tools/misc/make_sheet_id/make_sheet_id.cpp b/code/nel/tools/misc/make_sheet_id/make_sheet_id.cpp
index 5aefbcf4c..a8e095db3 100644
--- a/code/nel/tools/misc/make_sheet_id/make_sheet_id.cpp
+++ b/code/nel/tools/misc/make_sheet_id/make_sheet_id.cpp
@@ -529,9 +529,9 @@ int main( int argc, char ** argv )
 	readFormId( outputFileName );
 
 	// output path
-	sint lastSeparator = CFile::getLastSeparator(outputFileName);
+	std::string::size_type lastSeparator = CFile::getLastSeparator(outputFileName);
 	string outputPath;
-	if( lastSeparator != -1 )
+	if( lastSeparator != std::string::npos )
 	{
 		outputPath = outputFileName.substr(0,lastSeparator+1);
 	}
diff --git a/code/ryzom/server/src/ai_share/16x16_layer.h b/code/ryzom/server/src/ai_share/16x16_layer.h
index 49999a8fd..d8c3af912 100644
--- a/code/ryzom/server/src/ai_share/16x16_layer.h
+++ b/code/ryzom/server/src/ai_share/16x16_layer.h
@@ -77,6 +77,7 @@ typedef	CFastBitField<uint16, 16>	T1BitField;
 class	I16x16Layer
 {
 public:
+	virtual ~I16x16Layer() {}
 
 	/**
 	 * Get uncompressed value at i, j where i is y-like and j is x-like
diff --git a/code/ryzom/server/src/persistant_data_service/pds_database.h b/code/ryzom/server/src/persistant_data_service/pds_database.h
index fdd059c00..d6a26e6fe 100644
--- a/code/ryzom/server/src/persistant_data_service/pds_database.h
+++ b/code/ryzom/server/src/persistant_data_service/pds_database.h
@@ -74,7 +74,7 @@ public:
 	/**
 	 * Destructor
 	 */
-	~CDatabase();
+	virtual ~CDatabase();
 
 
 	/**
diff --git a/code/ryzom/tools/leveldesign/mission_compiler_lib/mission_compiler.cpp b/code/ryzom/tools/leveldesign/mission_compiler_lib/mission_compiler.cpp
index 39354138d..bc5cb6ad8 100644
--- a/code/ryzom/tools/leveldesign/mission_compiler_lib/mission_compiler.cpp
+++ b/code/ryzom/tools/leveldesign/mission_compiler_lib/mission_compiler.cpp
@@ -875,17 +875,26 @@ bool CMissionCompiler::publishFiles(const std::string &serverPathPrim, const std
 	return true;
 }
 
-bool CMissionCompiler::includeText(const std::string filename, const std::string text)
+bool CMissionCompiler::includeText(const std::string &filename, const std::string &text)
 {
 	FILE *f = nlfopen(filename, "r+");
 	if (f == NULL)
+	{
+		nlwarning("Unable to open %s", filename.c_str());
 		return false;
+	}
 
 	bool isIn = false;
 	char buffer[1024];
 
 	// Check for UTF8 format
-	fread(buffer, 1, 3, f);
+	if (fread(buffer, 1, 3, f) != 3)
+	{
+		fclose(f);
+		nlwarning("Unable to read 3 bytes from %s", filename.c_str());
+		return false;
+	}
+
 	if (buffer[0] != -17 || buffer[1] != -69 || buffer[2] != -65)
 		fseek(f, 0, SEEK_SET);
 
diff --git a/code/ryzom/tools/leveldesign/mission_compiler_lib/mission_compiler.h b/code/ryzom/tools/leveldesign/mission_compiler_lib/mission_compiler.h
index 46e0cc575..7016bd092 100644
--- a/code/ryzom/tools/leveldesign/mission_compiler_lib/mission_compiler.h
+++ b/code/ryzom/tools/leveldesign/mission_compiler_lib/mission_compiler.h
@@ -447,7 +447,7 @@ public:
 	bool publishFiles(const std::string &serverPathPrim, const std::string &serverPathText, const std::string &localPathText);
 
 	/// Search for text in the file : add it if it's not in
-	bool includeText(const std::string filename, const std::string text);
+	bool includeText(const std::string &filename, const std::string &text);
 	
 	/// Parse the pre requisite node of a mission.
 	bool parsePreRequisite(CMissionData &md, NLLIGO::IPrimitive *preReq);
diff --git a/code/ryzom/tools/leveldesign/mp_generator/main.cpp b/code/ryzom/tools/leveldesign/mp_generator/main.cpp
index 15740d477..353642ac6 100644
--- a/code/ryzom/tools/leveldesign/mp_generator/main.cpp
+++ b/code/ryzom/tools/leveldesign/mp_generator/main.cpp
@@ -1279,15 +1279,23 @@ void ItemNamesSave()
 	printf( "-- SAVING ITEM NAMES --\n");
 	CSString data, output;
 
-	FILE* file;
-	file = nlfopen( ITEM_WORDS_WK, "rb" );
+	FILE *file = nlfopen( ITEM_WORDS_WK, "rb" );
 
 	char c;
-	fread( &c, 1, 1, file );
+	if (fread(&c, 1, 1, file) != 1)
+	{
+		nlwarning("Unable to read 1 byte from %s", ITEM_WORDS_WK.c_str());
+		return;
+	}
+
 	while ( !feof( file ) )
 	{
 		data += toString( "%c", c );
-		fread( &c, 1, 1, file );
+		if (fread(&c, 1, 1, file) != 1)
+		{
+			nlwarning("Unable to read 1 byte from %s", ITEM_WORDS_WK.c_str());
+			return;
+		}
 	}
 
 	fclose( file );
diff --git a/code/ryzom/tools/leveldesign/named_items_2_csv/named_items_2_csv.cpp b/code/ryzom/tools/leveldesign/named_items_2_csv/named_items_2_csv.cpp
index d34e30c5a..c1c0c7aca 100644
--- a/code/ryzom/tools/leveldesign/named_items_2_csv/named_items_2_csv.cpp
+++ b/code/ryzom/tools/leveldesign/named_items_2_csv/named_items_2_csv.cpp
@@ -199,7 +199,13 @@ int getNbItemFromFile(const char *filename)
 	while (fgets(buffer, 1024, f))
 	{
 		int n;
-		fscanf(f, "_Items#%d", &n);
+		if (fscanf(f, "_Items#%d", &n) != 1)
+		{
+			fclose(f);
+			nlerror("Unable to parse 1 item from %s", filename);
+			return max;
+		}
+
 		if (n > max)
 			max = n;
 	}
@@ -247,7 +253,13 @@ int importCsv(const char *filename)
 
 	// read fields name
 	{
-		fgets(buffer, 1024, f);
+		if (fgets(buffer, 1024, f) != buffer)
+		{
+			fclose(f);
+			nlerror("Unable to read line from %s", filename);
+			return 1;
+		}
+
 		CSString s(buffer);
 		s = s.strtok("\n");
 
diff --git a/code/ryzom/tools/leveldesign/world_editor/world_editor/display.cpp b/code/ryzom/tools/leveldesign/world_editor/world_editor/display.cpp
index a1c1836a0..e25addbae 100644
--- a/code/ryzom/tools/leveldesign/world_editor/world_editor/display.cpp
+++ b/code/ryzom/tools/leveldesign/world_editor/world_editor/display.cpp
@@ -3400,7 +3400,7 @@ void CDisplay::updateCursor ()
 
 		// Moved with middle click ?
 		case DragView:
-			cursor = theApp.LoadCursor (MAKEINTRESOURCE(IDC_HAND));
+			cursor = theApp.LoadCursor (MAKEINTRESOURCE(IDC_HAND1));
 			break;
 
 		// Moved with left click ?
diff --git a/code/ryzom/tools/leveldesign/world_editor/world_editor/resource.h b/code/ryzom/tools/leveldesign/world_editor/world_editor/resource.h
index ce7382e1d..2a294d748 100644
--- a/code/ryzom/tools/leveldesign/world_editor/world_editor/resource.h
+++ b/code/ryzom/tools/leveldesign/world_editor/world_editor/resource.h
@@ -65,7 +65,7 @@
 #define IDI_LINE_HIDE                   149
 #define IDC_INSERT_POINT                149
 #define IDI_ZONE_HIDE                   150
-#define IDC_HAND                        150
+#define IDC_HAND1                       150
 #define IDI_ZONE                        151
 #define IDI_ZONE_OPENED                 151
 #define IDD_LOADING                     152
diff --git a/code/ryzom/tools/leveldesign/world_editor/world_editor/world_editor.rc b/code/ryzom/tools/leveldesign/world_editor/world_editor/world_editor.rc
index e465953a6..ce46045e4 100644
--- a/code/ryzom/tools/leveldesign/world_editor/world_editor/world_editor.rc
+++ b/code/ryzom/tools/leveldesign/world_editor/world_editor/world_editor.rc
@@ -934,7 +934,7 @@ IDC_COPY                CURSOR  DISCARDABLE     "res\\copy.cur"
 IDC_SELECT              CURSOR  DISCARDABLE     "res\\select.cur"
 IDC_SELECT_COPY         CURSOR  DISCARDABLE     "res\\select_copy.cur"
 IDC_INSERT_POINT        CURSOR  DISCARDABLE     "res\\insert_point.cur"
-IDC_HAND                CURSOR  DISCARDABLE     "res\\hand.cur"
+IDC_HAND1                CURSOR  DISCARDABLE     "res\\hand.cur"
 IDC_ZOOM                CURSOR  DISCARDABLE     "res\\zoom.cur"
 IDC_RADIUS              CURSOR  DISCARDABLE     "res\\radius.cur"