diff --git a/code/ryzom/tools/server/ai_build_wmap/build_proximity_maps.cpp b/code/ryzom/tools/server/ai_build_wmap/build_proximity_maps.cpp
index 2d5b13716..74a92024f 100644
--- a/code/ryzom/tools/server/ai_build_wmap/build_proximity_maps.cpp
+++ b/code/ryzom/tools/server/ai_build_wmap/build_proximity_maps.cpp
@@ -193,7 +193,7 @@ static void processProximityBuffer(const TBuffer& inputBuffer, uint32 lineLength
 	const uint32 bigValue= 15*5;
 
 	// determine numer of lines in the buffer...
-	uint32 numLines= inputBuffer.size()/ lineLength;
+	uint32 numLines= (uint32)inputBuffer.size()/ lineLength;
 
 	// clear out the result buffer and reset all values to 5*255, remembering that this is the correct value for the image edges
 	resultBuffer.clear();
@@ -561,7 +561,7 @@ void CProximityMapBuffer::generateZoneProximityMap(const CProximityZone& zone,TB
 
 	// setup the buffer's accessible points and prime vects[0] with the set of accessible points in the zone buffer
 	_prepareBufferForZoneProximityMap(zone,zoneBuffer,vects[0]);
-	entriesToTreat= vects[0].size();
+	entriesToTreat= (uint32)vects[0].size();
 
 	// lookup the buffer dimentions
 	uint32 zoneWidth= zone.getZoneWidth();
@@ -631,7 +631,7 @@ void CProximityMapBuffer::generateZoneProximityMap(const CProximityZone& zone,TB
 		}
 
 		// clear out the vector
-		entriesToTreat-= vect.size();
+		entriesToTreat-= (uint32)vect.size();
 		vect.clear();
 	}
 }
diff --git a/code/ryzom/tools/server/build_world_packed_col/build_world_packed_col.cpp b/code/ryzom/tools/server/build_world_packed_col/build_world_packed_col.cpp
index 7e70fd912..ee08eba42 100644
--- a/code/ryzom/tools/server/build_world_packed_col/build_world_packed_col.cpp
+++ b/code/ryzom/tools/server/build_world_packed_col/build_world_packed_col.cpp
@@ -53,7 +53,7 @@ static void getIslandsInside(sint32 xmin, sint32 xmax, sint32 ymin, sint32 ymax,
 {
 	dest.clear();	
 	R2::CScenarioEntryPoints &sep = R2::CScenarioEntryPoints::getInstance();	
-	uint numIslands = sep.getCompleteIslands().size();	
+	uint numIslands = (uint)sep.getCompleteIslands().size();	
 	for(uint l = 0; l < numIslands; ++l)
 	{				
 		const R2::CScenarioEntryPoints::CCompleteIsland &ci = sep.getCompleteIslands()[l];
@@ -129,7 +129,7 @@ int main(int argc, char* argv[])
 	CPackedWorldBuilder builder;
 	std::vector<CPackedWorldSmartPtr> islands;
 	std::vector<CVector>              startPositions;
-	uint numIslands = sep.getCompleteIslands().size();		
+	uint numIslands = (uint)sep.getCompleteIslands().size();		
 	//	
 	for(uint k = 0; k < numIslands; ++k)
 	{
@@ -168,13 +168,13 @@ int main(int argc, char* argv[])
 		// now, see which zones really should be found in that island
 		std::vector<std::string> presentZoneNames;
 		std::vector<std::string> presentZonePathes;
-		for(uint k = 0; k < zoneNames.size(); ++k)
+		for(uint l = 0; l < zoneNames.size(); ++l)
 		{
-			std::string zonePath = CPath::lookup(zoneNames[k], false, false);
+			std::string zonePath = CPath::lookup(zoneNames[l], false, false);
 			if (!zonePath.empty())
 			{
 				presentZonePathes.push_back(zonePath);
-				presentZoneNames.push_back(toLower(zoneNames[k]));
+				presentZoneNames.push_back(toLower(zoneNames[l]));
 			}
 		}
 		//
@@ -187,9 +187,9 @@ int main(int argc, char* argv[])
 			// the same zones were found -> now check their dates against the island one
 			uint32 packedIslandDate = CFile::getFileModificationDate(islandPath);
 			mustRebuild = false;
-			for(uint k = 0; k < presentZonePathes.size(); ++k)
+			for(uint l = 0; l < presentZonePathes.size(); ++l)
 			{				
-				if (CFile::getFileModificationDate(presentZonePathes[k]) > packedIslandDate)
+				if (CFile::getFileModificationDate(presentZonePathes[l]) > packedIslandDate)
 				{
 					mustRebuild = true;
 				}
diff --git a/code/ryzom/tools/server/build_world_packed_col/builder_config.cpp b/code/ryzom/tools/server/build_world_packed_col/builder_config.cpp
index b80a0341c..cd33b10c5 100644
--- a/code/ryzom/tools/server/build_world_packed_col/builder_config.cpp
+++ b/code/ryzom/tools/server/build_world_packed_col/builder_config.cpp
@@ -60,7 +60,7 @@ void CBuilderConfig::build(NLMISC::CConfigFile &cf)
 	if (searchPathsVar)
 	{
 		SearchPaths.resize(searchPathsVar->size());
-		for(sint k = 0; k < searchPathsVar->size(); ++k)
+		for(sint k = 0; k < (sint)searchPathsVar->size(); ++k)
 		{
 			SearchPaths[k] = searchPathsVar->asString(k);
 		}
@@ -70,7 +70,7 @@ void CBuilderConfig::build(NLMISC::CConfigFile &cf)
 	if (cwMapListVar)
 	{
 		CWMapList.resize(cwMapListVar->size());
-		for(sint k = 0; k < cwMapListVar->size(); ++k)
+		for(sint k = 0; k < (sint)cwMapListVar->size(); ++k)
 		{
 			CWMapList[k] = cwMapListVar->asString(k);
 		}
diff --git a/code/ryzom/tools/server/build_world_packed_col/packed_world_builder.cpp b/code/ryzom/tools/server/build_world_packed_col/packed_world_builder.cpp
index 812c2459c..c171fe2cf 100644
--- a/code/ryzom/tools/server/build_world_packed_col/packed_world_builder.cpp
+++ b/code/ryzom/tools/server/build_world_packed_col/packed_world_builder.cpp
@@ -563,14 +563,14 @@ void CPackedWorldBuilder::fly(std::vector<CIslandInfo>  &islands, float camSpeed
 		bool interFound = islands[currWorldIndex].PW->raytrace(camMat.getPos(), lookAtPos, inter, &triList);
 		if (!triList.empty())
 		{
-			vb.setNumVertices(3 * triList.size());
+			vb.setNumVertices(3 * (uint32)triList.size());
 			CVertexBufferReadWrite vba;
 			vb.lock(vba);
 			CVector *dest = vba.getVertexCoordPointer(0);
 			memcpy(dest, &triList[0], sizeof(CTriangle) * triList.size());
 			vba.unlock();
 			driver->activeVertexBuffer(vb);
-			driver->renderRawTriangles(material, 0, triList.size());
+			driver->renderRawTriangles(material, 0, (uint32)triList.size());
 		}				
 		if (interFound)
 		{