diff --git a/wrap/io_trimesh/export_obj.h b/wrap/io_trimesh/export_obj.h
index a91c7dc8..98f14de2 100644
--- a/wrap/io_trimesh/export_obj.h
+++ b/wrap/io_trimesh/export_obj.h
@@ -235,7 +235,7 @@ namespace io {
 			}
       assert(numvert == m.vn);
 
-			fprintf(fp,"# %d vertices, %d vertices normals\n\n",m.vn,NormalVertex.size());
+			fprintf(fp,"# %d vertices, %d vertices normals\n\n",m.vn,int(NormalVertex.size()));
 			
 			//faces + texture coords
 			FaceIterator fi;
@@ -304,7 +304,7 @@ namespace io {
         }
 
 			}//for
-			fprintf(fp,"# %d faces, %d coords texture\n\n",m.face.size(),CoordIndexTexture.size());
+			fprintf(fp,"# %d faces, %d coords texture\n\n",m.fn,int(CoordIndexTexture.size()));
 			
 			fprintf(fp,"# End of File");
 			fclose(fp);
@@ -342,7 +342,7 @@ namespace io {
 		/*
 			returns index of the vertex normal
 		*/
-		inline static int GetIndexVertexNormal(SaveMeshType &m, std::map<Point3f,int> &mapNormToInt, const Point3f &norm )
+		inline static int GetIndexVertexNormal(SaveMeshType &/*m*/, std::map<Point3f,int> &mapNormToInt, const Point3f &norm )
 		{
 		  std::map<Point3f,int>::iterator iter= mapNormToInt.find(norm);
 			if(iter != mapNormToInt.end()) return (*iter).second;
diff --git a/wrap/io_trimesh/export_stl.h b/wrap/io_trimesh/export_stl.h
index 71d58069..58381bb9 100644
--- a/wrap/io_trimesh/export_stl.h
+++ b/wrap/io_trimesh/export_stl.h
@@ -89,7 +89,7 @@ static int Save(SaveMeshType &m, const char * filename , bool binary =true, cons
 	if(binary)
 	{
 		// Write Header
-		char *header="VCG                                                                                                  ";
+		char header[128]="VCG                                                                                                  ";
 		if(objectname)	strncpy(header,objectname,80);
 		fwrite(header,80,1,fp);
 		// write number of facets
diff --git a/wrap/io_trimesh/export_vrml.h b/wrap/io_trimesh/export_vrml.h
index 0888d684..09ee7f76 100644
--- a/wrap/io_trimesh/export_vrml.h
+++ b/wrap/io_trimesh/export_vrml.h
@@ -84,7 +84,7 @@ namespace vcg {
 						);					
 
 					// Tranche principale
-					double ss = 8.0/m.bbox.Diag();					
+					//double ss = 8.0/m.bbox.Diag();					
 					
 					fprintf(fp,
 					"Transform {\n"
diff --git a/wrap/io_trimesh/import_obj.h b/wrap/io_trimesh/import_obj.h
index 48fc2230..8ad60d77 100644
--- a/wrap/io_trimesh/import_obj.h
+++ b/wrap/io_trimesh/import_obj.h
@@ -614,7 +614,7 @@ static int Open( OpenMeshType &m, const char * filename, Info &oi)
   {
     assert(m.face.size()==size_t(m.fn));
 	m.face[i].Alloc(indexedFaces[i].v.size()); // it does not do anything if it is a trimesh
-    for(int j=0;j<indexedFaces[i].v.size();++j)
+    for(uint j=0;j<indexedFaces[i].v.size();++j)
     {
       m.face[i].V(j)=&(m.vert[indexedFaces[i].v[j]]);
       if ( oi.mask & vcg::tri::io::Mask::IOM_WEDGTEXCOORD ) {