diff --git a/code/nel/src/misc/streamed_package_manager.cpp b/code/nel/src/misc/streamed_package_manager.cpp
index ecfb988b8..3fe497e3e 100644
--- a/code/nel/src/misc/streamed_package_manager.cpp
+++ b/code/nel/src/misc/streamed_package_manager.cpp
@@ -27,7 +27,7 @@ namespace NLMISC
 
 NLMISC_SAFE_SINGLETON_IMPL(CStreamedPackageManager);
 
-CStreamedPackageManager::CStreamedPackageManager()
+CStreamedPackageManager::CStreamedPackageManager() : Provider(NULL)
 {
 	// init
 }
diff --git a/code/nel/src/pacs/build_indoor.cpp b/code/nel/src/pacs/build_indoor.cpp
index ca14eb7cf..5b4c870d7 100644
--- a/code/nel/src/pacs/build_indoor.cpp
+++ b/code/nel/src/pacs/build_indoor.cpp
@@ -1,6 +1,9 @@
 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
 // Copyright (C) 2010  Winch Gate Property Limited
 //
+// This source file has been modified by the following contributors:
+// Copyright (C) 2019  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
+//
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as
 // published by the Free Software Foundation, either version 3 of the
@@ -17,6 +20,8 @@
 #include "stdpacs.h"
 #include "nel/pacs/build_indoor.h"
 
+#include <sstream>
+
 #include "nel/pacs/collision_mesh_build.h"
 #include "nel/pacs/local_retriever.h"
 #include "nel/pacs/exterior_mesh.h"
@@ -518,24 +523,26 @@ void	linkExteriorToInterior(CLocalRetriever &lr)
 
 		for (i=0; i<bchains.size(); ++i)
 		{
-			static char	buf[512], w[256];
+			char	w[256];
+			std::stringstream ss;
 			const CChain	&chain = chains[bchains[i]];
-			sprintf(buf, "chain=%d ", bchains[i]);
+			sprintf(w, "chain=%d ", bchains[i]);
+			ss << w;
 			uint	och;
 			for (och=0; och<chain.getSubChains().size(); ++och)
 			{
 				const COrderedChain3f	&ochain = ochains[chain.getSubChain(och)];
 				sprintf(w, "subchain=%d", chain.getSubChain(och));
-				strcat(buf, w);
+				ss << w;
 				uint	v;
 				for (v=0; v<ochain.getVertices().size(); ++v)
 				{
 					sprintf(w, " (%.2f,%.2f)", ochain[v].x, ochain[v].y);
-					strcat(buf, w);
+					ss << w;
 				}
 			}
 
-			nlinfo("%s", buf);
+			nlinfo("%s", ss.str().c_str());
 		}
 	}
 
diff --git a/code/nel/src/pacs/local_retriever.cpp b/code/nel/src/pacs/local_retriever.cpp
index 6ee2da559..9a73e8b28 100644
--- a/code/nel/src/pacs/local_retriever.cpp
+++ b/code/nel/src/pacs/local_retriever.cpp
@@ -2,7 +2,7 @@
 // Copyright (C) 2010  Winch Gate Property Limited
 //
 // This source file has been modified by the following contributors:
-// Copyright (C) 2015  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
+// Copyright (C) 2015-2019  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as
@@ -19,6 +19,8 @@
 
 #include "stdpacs.h"
 
+#include <sstream>
+
 #include "nel/misc/plane.h"
 
 #include "nel/pacs/local_retriever.h"
@@ -269,15 +271,16 @@ void	NLPACS::CLocalRetriever::dumpSurface(uint surf, const CVector &vect) const
 	{
 		const CRetrievableSurface::TLoop	&loop = surface._Loops[i];
 		nlinfo("-- loop %d: %d chains length=%.2f", i, loop.size(), loop.Length);
-		static char	wbuffer[256];
-		static char	buffer[10240];
-		sprintf(buffer, "    chains:");
+		char	wbuffer[256];
+		stringstream ss;
+		sprintf(wbuffer, "    chains:");
+		ss << wbuffer;
 		for (j=0; j<loop.size(); ++j)
 		{
 			sprintf(wbuffer, " %d[%d]", loop[j], surface._Chains[loop[j]].Chain);
-			strcat(buffer, wbuffer);
+			ss << wbuffer;
 		}
-		nlinfo("%s", buffer);
+		nlinfo("%s", ss.str().c_str());
 	}
 }
 
diff --git a/code/nel/tools/3d/zone_elevation/main.rc b/code/nel/tools/3d/zone_elevation/main.rc
index 05cf7c976..e4e8f736a 100644
--- a/code/nel/tools/3d/zone_elevation/main.rc
+++ b/code/nel/tools/3d/zone_elevation/main.rc
@@ -27,10 +27,10 @@ BEGIN
         BLOCK "040904b0"
         BEGIN
             VALUE "CompanyName", AUTHOR
-            VALUE "FileDescription", "NeL Zone Heightmap"
+            VALUE "FileDescription", "NeL Zone Elevation"
             VALUE "FileVersion", NL_VERSION
             VALUE "LegalCopyright", COPYRIGHT
-            VALUE "OriginalFilename", "zone_heightmap" NL_FILEEXT ".exe"
+            VALUE "OriginalFilename", "zone_elevation" NL_FILEEXT ".exe"
             VALUE "ProductName", "NeL Tools"
             VALUE "ProductVersion", NL_PRODUCT_VERSION
         END
diff --git a/code/nel/tools/3d/zone_welder/zone_welder.cpp b/code/nel/tools/3d/zone_welder/zone_welder.cpp
index 7ca1d822a..e33dd6862 100644
--- a/code/nel/tools/3d/zone_welder/zone_welder.cpp
+++ b/code/nel/tools/3d/zone_welder/zone_welder.cpp
@@ -1,6 +1,9 @@
 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
 // Copyright (C) 2010  Winch Gate Property Limited
 //
+// This source file has been modified by the following contributors:
+// Copyright (C) 2019  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
+//
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as
 // published by the Free Software Foundation, either version 3 of the
@@ -18,6 +21,10 @@
 #include "../zone_lib/zone_utility.h"
 
 #include <iostream>
+#include <sstream>
+#include <vector>
+#include <set>
+
 #include "nel/misc/types_nl.h"
 #include "nel/misc/file.h"
 #include "nel/misc/common.h"
@@ -27,8 +34,6 @@
 #include "nel/3d/zone_smoother.h"
 #include "nel/3d/zone_tgt_smoother.h"
 #include "nel/3d/zone_corner_smoother.h"
-#include <vector>
-#include <set>
 
 
 using namespace NL3D;
@@ -579,7 +584,8 @@ void weldZones(const char *center)
 				if (adjZonePatchs[patchIndex].BindEdges[edgeIndex].NPatchs!=0)
 				{
 					// Build an error message
-					char error[8000];
+					char buf[2048];
+					stringstream sserror;
 
 					// Zone name
 					string nameCenter, nameAdj;
@@ -587,10 +593,11 @@ void weldZones(const char *center)
 					getZoneNameByCoord (adjZonesId[i]&0xff, (adjZonesId[i]>>8)+1, nameAdj);
 
 					// Main message
-					smprintf (error, 2048,
+					smprintf(buf, 2048,
 						"Bind Error: try to bind the patch n %d in zone n %s with patch n %d in zone %s\n"
 						"This patch is already binded with the following patches : ", ptch+1, nameAdj.c_str(), 
 						patchIndex+1, nameCenter.c_str() );
+					sserror << buf;
 
 					// Sub message
 					for (uint i=0; i<adjZonePatchs[patchIndex].BindEdges[edgeIndex].NPatchs; i++)
@@ -599,16 +606,15 @@ void weldZones(const char *center)
 						bool last=(i==(uint)(adjZonePatchs[patchIndex].BindEdges[edgeIndex].NPatchs-1));
 
 						// Sub message
-						char subMessage[512];
-						smprintf ( subMessage, 512,
+						smprintf(buf, 2048,
 							"patch n %d%s", adjZonePatchs[patchIndex].BindEdges[edgeIndex].Next[i]+1, last?"\n":",");
 
 						// Concat the message
-						strcat (error, subMessage);
+						sserror << buf;
 					}
 
 					// Add an error message
-					errorMessage.push_back (error);
+					errorMessage.push_back(sserror.str());
 				}
 				else
 				{
diff --git a/code/nel/tools/pacs/build_indoor_rbank/mouline.cpp b/code/nel/tools/pacs/build_indoor_rbank/mouline.cpp
index 57592a431..c731e8438 100644
--- a/code/nel/tools/pacs/build_indoor_rbank/mouline.cpp
+++ b/code/nel/tools/pacs/build_indoor_rbank/mouline.cpp
@@ -1,6 +1,9 @@
 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
 // Copyright (C) 2010  Winch Gate Property Limited
 //
+// This source file has been modified by the following contributors:
+// Copyright (C) 2019  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
+//
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as
 // published by the Free Software Foundation, either version 3 of the
@@ -16,6 +19,7 @@
 
 #include <map>
 #include <vector>
+#include <sstream>
 
 #include "nel/pacs/collision_mesh_build.h"
 #include "nel/pacs/local_retriever.h"
@@ -278,24 +282,26 @@ void	linkExteriorToInterior(CLocalRetriever &lr)
 
 		for (i=0; i<bchains.size(); ++i)
 		{
-			static char	buf[512], w[256];
+			char w[256];
+			std::stringstream ss;
 			const CChain	&chain = chains[bchains[i]];
-			sprintf(buf, "Border chain %d: chain=%d ", i, bchains[i]);
+			sprintf(w, "Border chain %d: chain=%d ", i, bchains[i]);
+			ss << w;
 			uint	och;
 			for (och=0; och<chain.getSubChains().size(); ++och)
 			{
 				const COrderedChain3f	&ochain = ochains[chain.getSubChain(och)];
 				sprintf(w, "subchain=%d", chain.getSubChain(och));
-				strcat(buf, w);
+				ss << w;
 				uint	v;
 				for (v=0; v<ochain.getVertices().size(); ++v)
 				{
 					sprintf(w, " (%.2f,%.2f)", ochain[v].x, ochain[v].y);
-					strcat(buf, w);
+					ss << w;
 				}
 			}
 
-			nlinfo("%s", buf);
+			nlinfo("%s", ss.str().c_str());
 		}
 	}
 
diff --git a/code/nel/tools/pacs/build_rbank/build_surf.cpp b/code/nel/tools/pacs/build_rbank/build_surf.cpp
index 7172bae3d..c7425e943 100644
--- a/code/nel/tools/pacs/build_rbank/build_surf.cpp
+++ b/code/nel/tools/pacs/build_rbank/build_surf.cpp
@@ -883,7 +883,7 @@ void	NLPACS::CZoneTessellation::checkSameLandscapeHmBinds(const NL3D::CLandscape
 					// or at least the welding of zones should just keep the same welding as the non heightmapped one
 					nlwarning("ERROR: The zone %s has a different bind strucutre in the landscape and in the landscape_with_No_Heightmap", zoneName.c_str());
 					nlwarning("ERROR: Hint: Check your heightmap: it may be too precise or has too much noise, causing the zonewelder to behav differently...");
-					nlwarning("ERROR: Use the 'zone_heightmap' tool to resolve this!");
+					nlwarning("TIP: Use the 'zone_elevation' tool on the welded no-heightmap zones to resolve this!");
 					nlwarning("More Details (information landscape / information landscape_with_No_Heightmap):");
 					for(uint j=0;j<errors.size();j++)
 					{
diff --git a/code/ryzom/tools/leveldesign/georges_dll/georges_edit.cpp b/code/ryzom/tools/leveldesign/georges_dll/georges_edit.cpp
index db3d4655c..2941acdc0 100644
--- a/code/ryzom/tools/leveldesign/georges_dll/georges_edit.cpp
+++ b/code/ryzom/tools/leveldesign/georges_dll/georges_edit.cpp
@@ -1091,27 +1091,27 @@ bool CGeorgesEditApp::SerialIntoMemStream (const char *formName, CGeorgesEditDoc
 			{
 				if (array)
 				{
-					(safe_cast<const CFormElmArray*> (node))->write (nodeXml, doc->getFormPtr(), NULL);
+					(safe_cast<const CFormElmArray*> (node))->write (nodeXml, doc->getFormPtr(), std::string());
 				}
 				else
 				{
 					if (type == UFormDfn::EntryDfn)
 					{
-						(safe_cast<const CFormElmStruct*> (node))->write (nodeXml, doc->getFormPtr(), NULL);
+						(safe_cast<const CFormElmStruct*> (node))->write (nodeXml, doc->getFormPtr(), std::string());
 					}
 					else if (type == UFormDfn::EntryVirtualDfn)
 					{
-						(safe_cast<const CFormElmVirtualStruct*> (node))->write (nodeXml, doc->getFormPtr(), NULL);
+						(safe_cast<const CFormElmVirtualStruct*> (node))->write (nodeXml, doc->getFormPtr(), std::string());
 					}
 					else if (type == UFormDfn::EntryType)
 					{
-						(safe_cast<const CFormElmAtom*> (node))->write (nodeXml, doc->getFormPtr(), NULL);
+						(safe_cast<const CFormElmAtom*> (node))->write (nodeXml, doc->getFormPtr(), std::string());
 					}
 				}
 			}
 			else
 			{
-				(safe_cast<const CFormElmVirtualStruct*> (node))->write (nodeXml, doc->getFormPtr(), NULL);
+				(safe_cast<const CFormElmVirtualStruct*> (node))->write (nodeXml, doc->getFormPtr(), std::string());
 			}
 		}
 
diff --git a/code/ryzom/tools/leveldesign/world_editor/world_editor/generate_primitive.cpp b/code/ryzom/tools/leveldesign/world_editor/world_editor/generate_primitive.cpp
index a7364a60e..c841a458c 100644
--- a/code/ryzom/tools/leveldesign/world_editor/world_editor/generate_primitive.cpp
+++ b/code/ryzom/tools/leveldesign/world_editor/world_editor/generate_primitive.cpp
@@ -1,6 +1,9 @@
 // Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
 // Copyright (C) 2010  Winch Gate Property Limited
 //
+// This source file has been modified by the following contributors:
+// Copyright (C) 2019  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
+//
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU Affero General Public License as
 // published by the Free Software Foundation, either version 3 of the
@@ -16,6 +19,8 @@
 
 #include "stdafx.h"
 
+#include <sstream>
+
 #include "editor_primitive.h"
 #include "generate_primitive.h"
 #include "world_editor.h"
@@ -361,18 +366,15 @@ bool CGeneratePrimitive::generate (std::vector< std::vector<IPrimitive*> > &dest
 		}
 
 		// Error ?
-		if (!_FileNotFound.empty ())
+		if (!_FileNotFound.empty())
 		{
 			// Continue ?
-			char message[2048];
-			message[0] = 0;
-			for (uint i=0; i<_FileNotFound.size (); i++)
+			stringstream ssmessage;
+			for (uint i = 0; i < _FileNotFound.size(); i++)
 			{
-				strcat (message, _FileNotFound[i].c_str ());
-				strcat (message, "\n");
+				ssmessage << _FileNotFound[i] << "\n";
 			}
-
-			if (!theApp.yesNoMessage ("Can't load some files:\n%s\nContinue ?", message))
+			if (!theApp.yesNoMessage("Can't load some files:\n%s\nContinue ?", ssmessage.str()))
 			{
 				return false;
 			}