diff --git a/CAvToolSurfTm.cpp b/CAvToolSurfTm.cpp
index 5872799..9b14181 100644
--- a/CAvToolSurfTm.cpp
+++ b/CAvToolSurfTm.cpp
@@ -122,7 +122,7 @@ CAvToolSurfTm::TestPath( PNTULIST& lPntM, const Vector3d& vtDir, double dLinTol)
       ptPrev = ptCurr ;
       itPntMPrev = itPntMCurr ;
       ++ itPntMCurr ;
-     // gestione eventi (ogni 200 punti)
+     // gestione eventi (ogni 50 punti)
       ++ nCurr ;
       if ( ( nCurr % 50) == 0) {
          int nRes = ProcessEvents( int( nCurr * 100. / nCount), 0) ;
@@ -133,7 +133,7 @@ CAvToolSurfTm::TestPath( PNTULIST& lPntM, const Vector3d& vtDir, double dLinTol)
          }
       }
    }
-  // evnto completamento
+  // evento completamento
    ProcessEvents( 100, 0) ;
   // pulisco HashGrid 2d
    m_HGrids.Clear() ;
@@ -230,7 +230,6 @@ CAvToolSurfTm::MyTestPositionHG( Point3d& ptT, const Vector3d& vtDir)
       b3Tool.Expand( m_Tool.GetRadius(), m_Tool.GetRadius(), 0) ;
       b3Tool.ToLoc( m_frMove) ;
    }
-   b3Tool.Expand( 10 * EPS_SMALL) ;
   // ciclo sui triangoli che intersecano box in 2d 
    double dTotDist = 0 ;
    INTVECTOR vnIds ;
@@ -239,15 +238,15 @@ CAvToolSurfTm::MyTestPositionHG( Point3d& ptT, const Vector3d& vtDir)
          int nT = vnIds[i] ;
          Triangle3d Tria ;
          if ( ! m_pSTm->GetTriangle( nT, Tria))
-            return - 1 ;
+            return -1 ;
          ++ m_nTriaCAv ;
          double dDist = CAvToolTriangle( m_Tool, ptT, vtDir, Tria, m_frMove.VersZ()) ;
-         if ( dDist < - EPS_SMALL)
-            return -1 ;
          if ( dDist > EPS_SMALL) {
             dTotDist += dDist ;
             ptT += dDist * m_frMove.VersZ() ;
          }
+         else if ( dDist < -EPS_SMALL)
+            return -1 ;
       }
    }
    return dTotDist ;
diff --git a/EgtGeomKernel.vcxproj b/EgtGeomKernel.vcxproj
index 849934a..b270900 100644
--- a/EgtGeomKernel.vcxproj
+++ b/EgtGeomKernel.vcxproj
@@ -176,7 +176,7 @@ copy $(TargetPath) \EgtProg\DllD64</Command>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;_WINDOWS;I_AM_EGK;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <OpenMPSupport>true</OpenMPSupport>
+      <OpenMPSupport>false</OpenMPSupport>
       <CompileAs>CompileAsCpp</CompileAs>
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>
@@ -185,6 +185,10 @@ copy $(TargetPath) \EgtProg\DllD64</Command>
       <OmitFramePointers>true</OmitFramePointers>
       <FloatingPointModel>Precise</FloatingPointModel>
       <EnablePREfast>false</EnablePREfast>
+      <AdditionalOptions>
+      </AdditionalOptions>
+      <EnableFiberSafeOptimizations>false</EnableFiberSafeOptimizations>
+      <EnableParallelCodeGeneration>false</EnableParallelCodeGeneration>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>