diff --git a/README.md b/README.md
index b73caf5..d6920ca 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-<center><h2>Adaptive Multigrid Solvers (Version 10.06)</h2></center>
+<center><h2>Adaptive Multigrid Solvers (Version 10.07)</h2></center>
 <center>
 <a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.05/index.html#LINKS">links</a>
 <a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.05/index.html#EXECUTABLES">executables</a>
@@ -27,10 +27,11 @@ This code-base was born from the Poisson Surface Reconstruction code. It has evo
 <a href="http://www.cs.jhu.edu/~misha/MyPapers/ToG13.pdf">[Kazhdan and Hoppe, 2013]</a>
 <br>
 <b>Executables: </b>
-<a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.06/AdaptiveSolvers.x64.zip">Win64</a><br>
+<a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.07/AdaptiveSolvers.x64.zip">Win64</a><br>
 <b>Source Code:</b>
-<a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.06/AdaptiveSolvers.zip">ZIP</a> <a href="https://github.com/mkazhdan/PoissonRecon">GitHub</a><br>
+<a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.07/AdaptiveSolvers.zip">ZIP</a> <a href="https://github.com/mkazhdan/PoissonRecon">GitHub</a><br>
 <b>Older Versions:</b>
+<a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.06/">V10.06</a>,
 <a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.05/">V10.05</a>,
 <a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.04/">V10.04</a>,
 <a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.03/">V10.03</a>,
@@ -805,6 +806,12 @@ Similarly, to reduce compilation times, support for specific degrees can be remo
 <LI> Modified the 2D implementations of <CODE>PoissonRecon</CODE>, <CODE>SSDRecon</CODE>, and <CODE>AdaptiveTreeVisualization</CODE> to support ouput to <CODE>.jpg</CODE> and <CODE>.png</CODE> image files.
 </ol>
 
+<a href="http://www.cs.jhu.edu/~misha/Code/PoissonRecon/Version10.06/">Version 10.06</a>:
+<ol>
+<LI> Removed a bug that would cause memory access errors when some slices were empty.
+g</CODE> image files.
+</ol>
+
 </DETAILS>
 
 
diff --git a/Src/AdaptiveTreeVisualization.cpp b/Src/AdaptiveTreeVisualization.cpp
index 9f2e7b5..6720cdc 100644
--- a/Src/AdaptiveTreeVisualization.cpp
+++ b/Src/AdaptiveTreeVisualization.cpp
@@ -91,61 +91,59 @@ void ShowUsage( char* ex )
 }
 
 template< typename Real , unsigned int Dim >
-bool WriteImage( const Real *values , int res , const char *fileName , bool verbose )
+void WriteGrid( ConstPointer( Real ) values , int res , const char *fileName )
 {
-	if( Dim!=2 ) return false;
 	int resolution = 1;
 	for( int d=0 ; d<Dim ; d++ ) resolution *= res;
 
-	Real avg = 0;
-#pragma omp parallel for reduction( + : avg )
-	for( int i=0 ; i<resolution ; i++ ) avg += values[i];
-	avg /= (Real)resolution;
+	char *ext = GetFileExtension( fileName );
 
-	Real std = 0;
-#pragma omp parallel for reduction( + : std )
-	for( int i=0 ; i<resolution ; i++ ) std += ( values[i] - avg ) * ( values[i] - avg );
-	std = (Real)sqrt( std / resolution );
-
-	if( verbose ) printf( "Grid to image: [%.2f,%.2f] -> [0,255]\n" , avg - 2*std , avg + 2*std );
-
-	unsigned char *pixels = new unsigned char[ resolution*3 ];
-#pragma omp parallel for
-	for( int i=0 ; i<resolution ; i++ )
+	if( Dim==2 && ImageWriter::ValidExtension( ext ) )
 	{
-		Real v = (Real)std::min< Real >( (Real)1. , std::max< Real >( (Real)-1. , ( values[i] - avg ) / (2*std ) ) );
-		v = (Real)( ( v + 1. ) / 2. * 256. );
-		unsigned char color = (unsigned char )std::min< Real >( (Real)255. , std::max< Real >( (Real)0. , v ) );
-		for( int c=0 ; c<3 ; c++ ) pixels[i*3+c ] = color;
+		Real avg = 0;
+#pragma omp parallel for reduction( + : avg )
+		for( int i=0 ; i<resolution ; i++ ) avg += values[i];
+		avg /= (Real)resolution;
+
+		Real std = 0;
+#pragma omp parallel for reduction( + : std )
+		for( int i=0 ; i<resolution ; i++ ) std += ( values[i] - avg ) * ( values[i] - avg );
+		std = (Real)sqrt( std / resolution );
+
+		if( Verbose.set ) printf( "Grid to image: [%.2f,%.2f] -> [0,255]\n" , avg - 2*std , avg + 2*std );
+
+		unsigned char *pixels = new unsigned char[ resolution*3 ];
+#pragma omp parallel for
+		for( int i=0 ; i<resolution ; i++ )
+		{
+			Real v = (Real)std::min< Real >( (Real)1. , std::max< Real >( (Real)-1. , ( values[i] - avg ) / (2*std ) ) );
+			v = (Real)( ( v + 1. ) / 2. * 256. );
+			unsigned char color = (unsigned char )std::min< Real >( (Real)255. , std::max< Real >( (Real)0. , v ) );
+			for( int c=0 ; c<3 ; c++ ) pixels[i*3+c ] = color;
+		}
+		ImageWriter::Write( fileName , pixels , res , res , 3 );
+		delete[] pixels;
 	}
-	bool success = true;
-	try{ ImageWriter::Write( fileName , pixels , res , res , 3 ); }
-	catch( MKExceptions::Exception & ){ success = false; }
-	delete[] pixels;
-	return success;
-}
-
-template< typename Real , unsigned int Dim >
-void WriteGrid( const Real *values , int res , const char *fileName )
-{
-	int resolution = 1;
-	for( int d=0 ; d<Dim ; d++ ) resolution *= res;
-
-	FILE *fp = fopen( fileName , "wb" );
-	if( !fp ) ERROR_OUT( "Failed to open grid file for writing: %s" , fileName );
 	else
 	{
-		fwrite( &res , sizeof(int) , 1 , fp );
-		if( typeid(Real)==typeid(float) ) fwrite( values , sizeof(float) , resolution , fp );
+
+		FILE *fp = fopen( fileName , "wb" );
+		if( !fp ) ERROR_OUT( "Failed to open grid file for writing: %s" , fileName );
 		else
 		{
-			float *fValues = new float[resolution];
-			for( int i=0 ; i<resolution ; i++ ) fValues[i] = float( values[i] );
-			fwrite( fValues , sizeof(float) , resolution , fp );
-			delete[] fValues;
+			fwrite( &res , sizeof(int) , 1 , fp );
+			if( typeid(Real)==typeid(float) ) fwrite( values , sizeof(float) , resolution , fp );
+			else
+			{
+				float *fValues = new float[resolution];
+				for( int i=0 ; i<resolution ; i++ ) fValues[i] = float( values[i] );
+				fwrite( fValues , sizeof(float) , resolution , fp );
+				delete[] fValues;
+			}
+			fclose( fp );
 		}
-		fclose( fp );
 	}
+	delete[] ext;
 }
 
 template< unsigned int Dim , class Real , unsigned int FEMSig >
@@ -163,7 +161,7 @@ void _Execute( const FEMTree< Dim , Real >* tree , FILE* fp )
 		double t = Time();
 		Pointer( Real ) values = tree->template regularGridEvaluate< true >( coefficients , res , -1 , PrimalGrid.set );
 		if( Verbose.set ) printf( "Got grid: %.2f(s)\n" , Time()-t );
-		if( !WriteImage< Real , Dim >( values , res , OutGrid.value , Verbose.set ) ) WriteGrid< Real , Dim >( values , res , OutGrid.value );
+		WriteGrid< Real , Dim >( values , res , OutGrid.value );
 		DeletePointer( values );
 	}
 
diff --git a/Src/FEMTree.h b/Src/FEMTree.h
index 767403c..a15a254 100644
--- a/Src/FEMTree.h
+++ b/Src/FEMTree.h
@@ -42,7 +42,7 @@ DAMAGE.
 #ifndef FEM_TREE_INCLUDED
 #define FEM_TREE_INCLUDED
 
-#define VERSION "10.06"
+#define VERSION "10.07"
 #define MEMORY_ALLOCATOR_BLOCK_SIZE 1<<12
 
 #define NEW_CODE
diff --git a/Src/Image.h b/Src/Image.h
index 315ba51..345a3d7 100644
--- a/Src/Image.h
+++ b/Src/Image.h
@@ -37,6 +37,7 @@ struct ImageReader
 		return pixels;
 	}
 
+	static bool ValidExtension( const char *ext );
 	static ImageReader* Get( const char* fileName );
 	static void GetInfo( const char* fileName , unsigned int& width , unsigned int& height , unsigned int& channels );
 	virtual ~ImageReader( void ){ }
@@ -70,6 +71,8 @@ struct ImageWriter
 		for( unsigned int j=0 ; j<height ; j++ ) writer->nextRow( pixels + j*width*channels );
 		delete writer;
 	}
+
+	static bool ValidExtension( const char *ext );
 	static ImageWriter* Get( const char* fileName , unsigned int width , unsigned int height , unsigned int channels , ImageWriterParams params=ImageWriterParams() );
 	virtual ~ImageWriter( void ){ }
 	unsigned int width( void ) const { return _width; }
@@ -160,6 +163,20 @@ protected:
 	}
 };
 
+inline bool ImageReader::ValidExtension( const char *ext )
+{
+#ifdef WIN32
+	if     ( !_stricmp( ext , "jpeg" ) || !_stricmp( ext , "jpg" ) ) return true;
+	else if( !_stricmp( ext , "png" )                              ) return true;
+	else if( !_stricmp( ext , "iGrid" )                            ) return true;
+#else // !WIN32
+	if( !strcasecmp( ext , "jpeg" ) || !strcasecmp( ext , "jpg" ) ) return true;
+	else if( !strcasecmp( ext , "png" )                           ) return true;
+	else if( !strcasecmp( ext , "iGrid" )                         ) return true;
+#endif // WIN32
+	return false;
+}
+
 inline ImageReader* ImageReader::Get( const char* fileName )
 {
 	unsigned int width , height , channels;
@@ -200,6 +217,25 @@ inline void ImageReader::GetInfo( const char* fileName , unsigned int& width , u
 #endif // WIN32
 	delete[] ext;
 }
+
+inline bool ImageWriter::ValidExtension( const char *ext )
+{
+#ifdef WIN32
+	if( !_stricmp( ext , "jpeg" ) || !_stricmp( ext , "jpg" ) ) return true;
+	else if( !_stricmp( ext , "png" ) )                         return true;
+#ifdef SUPPORT_TILES
+	else if( !_stricmp( ext , "iGrid" ) )                       return true;
+#endif // SUPPORT_TILES
+#else // !WIN32
+	if( !strcasecmp( ext , "jpeg" ) || !strcasecmp( ext , "jpg" ) ) return true;
+	else if( !strcasecmp( ext , "png" ) )                           return true;
+#ifdef SUPPORT_TILES
+	else if( !strcasecmp( ext , "iGrid" ) )                         return true;
+#endif // SUPPORT_TILES
+#endif // WIN32
+	return false;
+}
+
 inline ImageWriter* ImageWriter::Get( const char* fileName , unsigned int width , unsigned int height , unsigned int channels , ImageWriterParams params )
 {
 	ImageWriter* writer = NULL;
diff --git a/Src/PoissonRecon.cpp b/Src/PoissonRecon.cpp
index bdaafb7..d6a194d 100644
--- a/Src/PoissonRecon.cpp
+++ b/Src/PoissonRecon.cpp
@@ -353,63 +353,62 @@ void ExtractMesh( UIntPack< FEMSigs ... > , std::tuple< SampleData ... > , FEMTr
 }
 
 template< typename Real , unsigned int Dim >
-bool WriteImage( const Real *values , int res , const char *fileName , bool verbose )
+void WriteGrid( ConstPointer( Real ) values , int res , const char *fileName )
 {
-	if( Dim!=2 ) return false;
 	int resolution = 1;
 	for( int d=0 ; d<Dim ; d++ ) resolution *= res;
 
-	Real avg = 0;
-#pragma omp parallel for reduction( + : avg )
-	for( int i=0 ; i<resolution ; i++ ) avg += values[i];
-	avg /= (Real)resolution;
+	char *ext = GetFileExtension( fileName );
 
-	Real std = 0;
-#pragma omp parallel for reduction( + : std )
-	for( int i=0 ; i<resolution ; i++ ) std += ( values[i] - avg ) * ( values[i] - avg );
-	std = (Real)sqrt( std / resolution );
-
-	if( verbose ) printf( "Grid to image: [%.2f,%.2f] -> [0,255]\n" , avg - 2*std , avg + 2*std );
-
-	unsigned char *pixels = new unsigned char[ resolution*3 ];
-#pragma omp parallel for
-	for( int i=0 ; i<resolution ; i++ )
+	if( Dim==2 && ImageWriter::ValidExtension( ext ) )
 	{
-		Real v = (Real)std::min< Real >( (Real)1. , std::max< Real >( (Real)-1. , ( values[i] - avg ) / (2*std ) ) );
-		v = (Real)( ( v + 1. ) / 2. * 256. );
-		unsigned char color = (unsigned char )std::min< Real >( (Real)255. , std::max< Real >( (Real)0. , v ) );
-		for( int c=0 ; c<3 ; c++ ) pixels[i*3+c ] = color;
+		Real avg = 0;
+#pragma omp parallel for reduction( + : avg )
+		for( int i=0 ; i<resolution ; i++ ) avg += values[i];
+		avg /= (Real)resolution;
+
+		Real std = 0;
+#pragma omp parallel for reduction( + : std )
+		for( int i=0 ; i<resolution ; i++ ) std += ( values[i] - avg ) * ( values[i] - avg );
+		std = (Real)sqrt( std / resolution );
+
+		if( Verbose.set ) printf( "Grid to image: [%.2f,%.2f] -> [0,255]\n" , avg - 2*std , avg + 2*std );
+
+		unsigned char *pixels = new unsigned char[ resolution*3 ];
+#pragma omp parallel for
+		for( int i=0 ; i<resolution ; i++ )
+		{
+			Real v = (Real)std::min< Real >( (Real)1. , std::max< Real >( (Real)-1. , ( values[i] - avg ) / (2*std ) ) );
+			v = (Real)( ( v + 1. ) / 2. * 256. );
+			unsigned char color = (unsigned char )std::min< Real >( (Real)255. , std::max< Real >( (Real)0. , v ) );
+			for( int c=0 ; c<3 ; c++ ) pixels[i*3+c ] = color;
+		}
+		ImageWriter::Write( fileName , pixels , res , res , 3 );
+		delete[] pixels;
 	}
-	bool success = true;
-	try{ ImageWriter::Write( fileName , pixels , res , res , 3 ); }
-	catch( MKExceptions::Exception & ){ success = false; }
-	delete[] pixels;
-	return success;
-}
-
-template< typename Real , unsigned int Dim >
-void WriteGrid( const Real *values , int res , const char *fileName )
-{
-	int resolution = 1;
-	for( int d=0 ; d<Dim ; d++ ) resolution *= res;
-
-	FILE *fp = fopen( fileName , "wb" );
-	if( !fp ) ERROR_OUT( "Failed to open grid file for writing: %s" , fileName );
 	else
 	{
-		fwrite( &res , sizeof(int) , 1 , fp );
-		if( typeid(Real)==typeid(float) ) fwrite( values , sizeof(float) , resolution , fp );
+
+		FILE *fp = fopen( fileName , "wb" );
+		if( !fp ) ERROR_OUT( "Failed to open grid file for writing: %s" , fileName );
 		else
 		{
-			float *fValues = new float[resolution];
-			for( int i=0 ; i<resolution ; i++ ) fValues[i] = float( values[i] );
-			fwrite( fValues , sizeof(float) , resolution , fp );
-			delete[] fValues;
+			fwrite( &res , sizeof(int) , 1 , fp );
+			if( typeid(Real)==typeid(float) ) fwrite( values , sizeof(float) , resolution , fp );
+			else
+			{
+				float *fValues = new float[resolution];
+				for( int i=0 ; i<resolution ; i++ ) fValues[i] = float( values[i] );
+				fwrite( fValues , sizeof(float) , resolution , fp );
+				delete[] fValues;
+			}
+			fclose( fp );
 		}
-		fclose( fp );
 	}
+	delete[] ext;
 }
 
+
 template< class Real , typename ... SampleData , unsigned int ... FEMSigs >
 void Execute( int argc , char* argv[] , UIntPack< FEMSigs ... > )
 {
@@ -669,7 +668,7 @@ void Execute( int argc , char* argv[] , UIntPack< FEMSigs ... > )
 #pragma omp parallel for
 		for( int i=0 ; i<resolution ; i++ ) values[i] -= isoValue;
 		profiler.dumpOutput( "Got grid:" );
-		if( !WriteImage< Real , DIMENSION >( values , res , Grid.value , Verbose.set ) ) WriteGrid< Real , DIMENSION >( values , res , Grid.value );
+		WriteGrid< Real , DIMENSION >( values , res , Grid.value );
 		DeletePointer( values );
 		if( Verbose.set )
 		{
diff --git a/Src/SSDRecon.cpp b/Src/SSDRecon.cpp
index cc92e44..e966acd 100644
--- a/Src/SSDRecon.cpp
+++ b/Src/SSDRecon.cpp
@@ -377,63 +377,62 @@ void ExtractMesh( UIntPack< FEMSigs ... > , std::tuple< SampleData ... > , FEMTr
 }
 
 template< typename Real , unsigned int Dim >
-bool WriteImage( const Real *values , int res , const char *fileName , bool verbose )
+void WriteGrid( ConstPointer( Real ) values , int res , const char *fileName )
 {
-	if( Dim!=2 ) return false;
 	int resolution = 1;
 	for( int d=0 ; d<Dim ; d++ ) resolution *= res;
 
-	Real avg = 0;
-#pragma omp parallel for reduction( + : avg )
-	for( int i=0 ; i<resolution ; i++ ) avg += values[i];
-	avg /= (Real)resolution;
+	char *ext = GetFileExtension( fileName );
 
-	Real std = 0;
-#pragma omp parallel for reduction( + : std )
-	for( int i=0 ; i<resolution ; i++ ) std += ( values[i] - avg ) * ( values[i] - avg );
-	std = (Real)sqrt( std / resolution );
-
-	if( verbose ) printf( "Grid to image: [%.2f,%.2f] -> [0,255]\n" , avg - 2*std , avg + 2*std );
-
-	unsigned char *pixels = new unsigned char[ resolution*3 ];
-#pragma omp parallel for
-	for( int i=0 ; i<resolution ; i++ )
+	if( Dim==2 && ImageWriter::ValidExtension( ext ) )
 	{
-		Real v = (Real)std::min< Real >( (Real)1. , std::max< Real >( (Real)-1. , ( values[i] - avg ) / (2*std ) ) );
-		v = (Real)( ( v + 1. ) / 2. * 256. );
-		unsigned char color = (unsigned char )std::min< Real >( (Real)255. , std::max< Real >( (Real)0. , v ) );
-		for( int c=0 ; c<3 ; c++ ) pixels[i*3+c ] = color;
+		Real avg = 0;
+#pragma omp parallel for reduction( + : avg )
+		for( int i=0 ; i<resolution ; i++ ) avg += values[i];
+		avg /= (Real)resolution;
+
+		Real std = 0;
+#pragma omp parallel for reduction( + : std )
+		for( int i=0 ; i<resolution ; i++ ) std += ( values[i] - avg ) * ( values[i] - avg );
+		std = (Real)sqrt( std / resolution );
+
+		if( Verbose.set ) printf( "Grid to image: [%.2f,%.2f] -> [0,255]\n" , avg - 2*std , avg + 2*std );
+
+		unsigned char *pixels = new unsigned char[ resolution*3 ];
+#pragma omp parallel for
+		for( int i=0 ; i<resolution ; i++ )
+		{
+			Real v = (Real)std::min< Real >( (Real)1. , std::max< Real >( (Real)-1. , ( values[i] - avg ) / (2*std ) ) );
+			v = (Real)( ( v + 1. ) / 2. * 256. );
+			unsigned char color = (unsigned char )std::min< Real >( (Real)255. , std::max< Real >( (Real)0. , v ) );
+			for( int c=0 ; c<3 ; c++ ) pixels[i*3+c ] = color;
+		}
+		ImageWriter::Write( fileName , pixels , res , res , 3 );
+		delete[] pixels;
 	}
-	bool success = true;
-	try{ ImageWriter::Write( fileName , pixels , res , res , 3 ); }
-	catch( MKExceptions::Exception & ){ success = false; }
-	delete[] pixels;
-	return success;
-}
-
-template< typename Real , unsigned int Dim >
-void WriteGrid( const Real *values , int res , const char *fileName )
-{
-	int resolution = 1;
-	for( int d=0 ; d<Dim ; d++ ) resolution *= res;
-
-	FILE *fp = fopen( fileName , "wb" );
-	if( !fp ) ERROR_OUT( "Failed to open grid file for writing: %s" , fileName );
 	else
 	{
-		fwrite( &res , sizeof(int) , 1 , fp );
-		if( typeid(Real)==typeid(float) ) fwrite( values , sizeof(float) , resolution , fp );
+
+		FILE *fp = fopen( fileName , "wb" );
+		if( !fp ) ERROR_OUT( "Failed to open grid file for writing: %s" , fileName );
 		else
 		{
-			float *fValues = new float[resolution];
-			for( int i=0 ; i<resolution ; i++ ) fValues[i] = float( values[i] );
-			fwrite( fValues , sizeof(float) , resolution , fp );
-			delete[] fValues;
+			fwrite( &res , sizeof(int) , 1 , fp );
+			if( typeid(Real)==typeid(float) ) fwrite( values , sizeof(float) , resolution , fp );
+			else
+			{
+				float *fValues = new float[resolution];
+				for( int i=0 ; i<resolution ; i++ ) fValues[i] = float( values[i] );
+				fwrite( fValues , sizeof(float) , resolution , fp );
+				delete[] fValues;
+			}
+			fclose( fp );
 		}
-		fclose( fp );
 	}
+	delete[] ext;
 }
 
+
 template< class Real , typename ... SampleData , unsigned int ... FEMSigs >
 void Execute( int argc , char* argv[] , UIntPack< FEMSigs ... > )
 {
@@ -674,7 +673,7 @@ void Execute( int argc , char* argv[] , UIntPack< FEMSigs ... > )
 #pragma omp parallel for
 		for( int i=0 ; i<resolution ; i++ ) values[i] -= isoValue;
 		profiler.dumpOutput( "Got grid:" );
-		if( !WriteImage< Real , DIMENSION >( values , res , Grid.value , Verbose.set ) ) WriteGrid< Real , DIMENSION >( values , res , Grid.value );
+		WriteGrid< Real , DIMENSION >( values , res , Grid.value );
 		DeletePointer( values );
 		if( Verbose.set )
 		{
diff --git a/Src/SparseMatrix.inl b/Src/SparseMatrix.inl
index d912c1d..d7a6d1c 100644
--- a/Src/SparseMatrix.inl
+++ b/Src/SparseMatrix.inl
@@ -598,13 +598,18 @@ template< class T , class IndexType , size_t MaxRowSize >
 template< class T2 >
 void SparseMatrix< T , IndexType , MaxRowSize >::operator() ( const T2* in , T2* out ) const { Interface::multiply( in , out ); }
 
-template< class T , class IndexType , size_t MaxRowSize > SparseMatrix< T , IndexType , MaxRowSize >::~SparseMatrix( void ) { resize( 0 ); }
+template< class T , class IndexType , size_t MaxRowSize >
+SparseMatrix< T , IndexType , MaxRowSize >::~SparseMatrix( void )
+{
+	FreePointer( _rowSizes );
+	FreePointer( _entries );
+}
 
 template< class T , class IndexType , size_t MaxRowSize >
 void SparseMatrix< T , IndexType , MaxRowSize >::resize( size_t rowNum )
 {
 	_rowNum = rowNum;
-	if( !rowNum || rowNum>_maxRows )
+	if( rowNum>_maxRows )
 	{
 		FreePointer( _rowSizes );
 		FreePointer( _entries );