diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 4df34e0..61516c8 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/VolZmapGraphics.cpp b/VolZmapGraphics.cpp
index 2cd8b29..634ad45 100644
--- a/VolZmapGraphics.cpp
+++ b/VolZmapGraphics.cpp
@@ -36,7 +36,7 @@ using namespace std ;
 static const int MAX_FAN_BASE_VERTS = 7 ; 
 typedef Eigen::Matrix<double, Eigen::Dynamic, Eigen::Dynamic, Eigen::ColMajor, MAX_FAN_BASE_VERTS, 3> SvdMatrix ;
 typedef Eigen::Matrix<double, Eigen::Dynamic, 1, Eigen::ColMajor, MAX_FAN_BASE_VERTS, 1> SvdVector ;
-typedef Eigen::JacobiSVD<SvdMatrix, Eigen::QRPreconditioners::ColPivHouseholderQRPreconditioner> SvdDecomposer ;
+typedef Eigen::JacobiSVD<SvdMatrix, Eigen::ComputeThinU | Eigen::ComputeThinV> SvdDecomposer ;
 
 // ------------------------- FUNZIONE TEST SULLE NORMALI --------------------------------------------------------------------------
 enum FatureType { NO_FEATURE = 0, CORNER = 1, EDGE = 2} ; 
@@ -2036,7 +2036,7 @@ VolZmap::ExtMarchingCubes( int nBlock, VoxelContainer& vVox) const
                   }
 
                  // calcolo SVD 
-                  SvdDecomposer svd( dMatrixN, Eigen::ComputeThinU | Eigen::ComputeThinV) ;
+                  SvdDecomposer svd( dMatrixN) ;
                   const auto& dSingularValue = svd.singularValues() ;
                   const auto& dMatrixV = svd.matrixV() ;