diff --git a/src/implementation/mesh/tnlGrid2D_impl.h b/src/implementation/mesh/tnlGrid2D_impl.h
index fc8ce7630865604cb71a7abcabbd32e1d3e2938d..b475d06f44c2969dbb1a1545615ece0efd8bf9af 100644
--- a/src/implementation/mesh/tnlGrid2D_impl.h
+++ b/src/implementation/mesh/tnlGrid2D_impl.h
@@ -194,8 +194,8 @@ template< typename Real,
 void tnlGrid< 2, Real, Device, Index, Geometry > :: getElementCoordinates( const Index element,
                                                                            CoordinatesType& coordinates ) const
 {
-   tnlAssert( i >= 0 && i < dofs,
-              cerr << " i = " << i << " dofs = " << dofs
+   tnlAssert( element >= 0 && element < dofs,
+              cerr << " element = " << element << " dofs = " << dofs
                    << " in tnlGrid " << this -> getName(); );
 
    coordinates. x() = element % this -> dimensions. x();
diff --git a/src/implementation/mesh/tnlIdenticalGridGeometry_impl.h b/src/implementation/mesh/tnlIdenticalGridGeometry_impl.h
index f288d9edbe4d2e2c0a7c3900290d11c36396b7bb..fdc91b8605113d4c46e634c510e2f918e7c16041 100644
--- a/src/implementation/mesh/tnlIdenticalGridGeometry_impl.h
+++ b/src/implementation/mesh/tnlIdenticalGridGeometry_impl.h
@@ -97,7 +97,7 @@ template< Index dx >
 void tnlIdenticalGridGeometry< 1, Real, Device, Index > :: getEdgeNormal( const Index i,
                                                                           VertexType& normal ) const
 {
-   tnlAssert( dx == 1 || dx == -1, cerr << " dx = " << dx << " dy = " << dy << endl );
+   tnlAssert( dx == 1 || dx == -1, cerr << " dx = " << dx << endl );
    normal. x() = dx;
 }
 
diff --git a/src/implementation/schemes/euler/fvm/tnlLaxFridrichs_impl.h b/src/implementation/schemes/euler/fvm/tnlLaxFridrichs_impl.h
index 352924c31a91e4889209bf72f1612d7dc20c4d36..44b2bf9abb1d7a9355cc89c8024e38162f72c729 100644
--- a/src/implementation/schemes/euler/fvm/tnlLaxFridrichs_impl.h
+++ b/src/implementation/schemes/euler/fvm/tnlLaxFridrichs_impl.h
@@ -31,6 +31,9 @@ tnlLaxFridrichs< tnlGrid< 2, Real, Device, Index, GridGeometry >,
   mesh( 0 ),
   pressureGradient( 0 )
 {
+   rho. setName( "Lax-Fridrichs:rho" );
+   rho_u1. setName( "Lax-Fridrichs:rho_u1" );
+   rho_u2. setName( "Lax-Fridrichs:rho_u2" );
 }
 
 template< typename Real,