diff --git a/CDeCylTria.cpp b/CDeCylTria.cpp
index 1636cc2..595aeb9 100644
--- a/CDeCylTria.cpp
+++ b/CDeCylTria.cpp
@@ -35,7 +35,7 @@ CDeCylTria( const Frame3d& frCyl, double dH, double dR, double dSafeDist, const
    plyTria.Trim( plTrimB, true, false, false) ;
    Plane3d plTrimT ;
    plTrimT.Set( dH + dSafeDist, Z_AX) ;
-   plyTria.Trim( plTrimB, true, false, false) ;
+   plyTria.Trim( plTrimT, true, false, false) ;
   // Se non è rimasto alcunchè, allora non c'è collisione
    if ( plyTria.GetSideCount() == 0)
       return false ;
diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 98d7bfa..3570256 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ