diff --git a/CurveComposite.cpp b/CurveComposite.cpp
index cff3ca5..dbae6c7 100644
--- a/CurveComposite.cpp
+++ b/CurveComposite.cpp
@@ -1028,7 +1028,7 @@ CurveComposite::GetMidDir( Vector3d& vtDir) const
    if ( ! GetLength( dLen)  ||  ! GetParamAtLength( 0.5 * dLen, dMid))
       return false ;
   // calcolo la direzione         
-   return ::GetTang( *this, 0.5 * m_CrvSmplS.size(), FROM_MINUS, vtDir) ;
+   return ::GetTang( *this, dMid, FROM_MINUS, vtDir) ;
 }
 
 //----------------------------------------------------------------------------
diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 08bfb16..08e962b 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/GdbExecutor.cpp b/GdbExecutor.cpp
index fde9548..e73c658 100644
--- a/GdbExecutor.cpp
+++ b/GdbExecutor.cpp
@@ -7921,7 +7921,7 @@ GdbExecutor::ExecuteOutTextIcci( const string& sCmd2, const STRVECTOR& vsParams)
             sText += "<br/>   " ;
          sText += " U=" + ToString( aInfo.IciA[j].dU,7) + " P=(" + ToString( aInfo.IciA[j].ptI,4) + ")" ;
          switch( aInfo.IciA[j].nPrevTy) {
-         case ICCT_NULL : sText += " ??-" ; break ;
+         case ICCT_NULL : sText += " ?" "?-" ; break ;
          case ICCT_IN : sText += " IN-" ; break ;
          case ICCT_OUT : sText += " OUT-" ; break ;
          case ICCT_ON : sText += " ON-" ; break ;
@@ -7940,7 +7940,7 @@ GdbExecutor::ExecuteOutTextIcci( const string& sCmd2, const STRVECTOR& vsParams)
             sText += string( "<br/>") + ( aInfo.bCBOverEq ? " + " : " - ") ;
          sText += " U=" + ToString( aInfo.IciB[j].dU,7) + " P=(" + ToString( aInfo.IciB[j].ptI,4) + ")" ;
          switch( aInfo.IciB[j].nPrevTy) {
-         case ICCT_NULL : sText += " ??-" ; break ;
+         case ICCT_NULL : sText += " ?" "?-" ; break ;
          case ICCT_IN : sText += " IN-" ; break ;
          case ICCT_OUT : sText += " OUT-" ; break ;
          case ICCT_ON : sText += " ON-" ; break ;