diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 0ecd9a6..d3fb16d 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/ExtDimension.cpp b/ExtDimension.cpp
index beb3fbd..010ede8 100644
--- a/ExtDimension.cpp
+++ b/ExtDimension.cpp
@@ -796,7 +796,7 @@ ExtDimension::GetTextHalfDist( const Point3d& ptText) const
    double dHalfDist = m_dTextHeight / 2 + m_dTextDist ;
   // recupero il box di ingombro del testo
    BBox3d b3Text ;
-   if ( GetTextMyBBox( ptText, b3Text)) {
+   if ( GetTextMyBBox( ptText, b3Text)  &&  ! b3Text.IsEmpty()) {
       double dHalfL = ( b3Text.GetMax().x - b3Text.GetMin().x) / 2 ;
       double dHalfH = ( b3Text.GetMax().y - b3Text.GetMin().y) / 2 ;
       dHalfDist = sqrt( dHalfL * dHalfL + dHalfH * dHalfH) ;