diff -u -r1.2 -r1.3
--- GTrackState.cpp	10 Aug 2011 22:07:06 -0000	1.2
+++ GTrackState.cpp	10 Aug 2011 23:04:24 -0000	1.3
@@ -208,12 +208,11 @@

 }
 
 //**********************************************************************

-/* cng

 void GTrackState::inverse_kalman() const {
   if(_tre_nohit.is_valid())
     return;
 

-  assert(cluster().is_valid());

+  assert(cluster());

   assert(_fit_status == OPTIMAL || 
 	 _fit_status == FORWARD || 
 	 _fit_status == BACKWARD);

@@ -222,7 +221,7 @@

   //ClusterPtr pclu = ppclu->new_trf_cluster();
   //assert( pclu != 0 );
  

-  const HitList& hlist = pclu->predict(_tre);

+  const HitList& hlist = _pclu->predict(_tre);

   assert( hlist.size() > 0 );
   const HitPtr& phit = hlist.front();
 

@@ -239,7 +238,7 @@

   if( invert(tot_err) ) {
     _tre_nohit=ETrack();
     _chi_square_nohit = -2.;

-    delete pclu;

+//    delete pclu;

     return;
   }
 

@@ -270,7 +269,7 @@

     if ( nbad > 0 ) {
       _tre_nohit=ETrack();
       _chi_square_nohit = -3.;

-      delete pclu;

+//      delete pclu;

       return;
     }
   }

@@ -283,9 +282,9 @@

 
   _chi_square_nohit = _chi_square + dchsq;
 

-  delete pclu;

+//  delete pclu;

 }

-*/

+

 //**********************************************************************
 
 // Output stream.