diff --git a/ExtDimension.cpp b/ExtDimension.cpp
index 3b9f266..43d40f6 100644
--- a/ExtDimension.cpp
+++ b/ExtDimension.cpp
@@ -1287,7 +1287,6 @@ ExtDimension::ApproxWithLines( double dLinTol, double dAngTolDeg, POLYLINELIST&
       PtrOwner<CurveArc> pCrvPos( CreateBasicCurveArc()) ;
       if ( IsNull( pCrvPos))
          return false ;
-      double dHalfDist = GetTextHalfDist( m_ptCalcPos) ;
      // calcolo ptP5_bis
       Vector3d vtLine2 = m_ptP2 - m_ptP6 ;
       double dLen2 = vtLine2.Len() ;