Bug fix by Alexandru

diff --git a/TRD/AliTRDtrackerV1.cxx b/TRD/AliTRDtrackerV1.cxx
index bd1ab8385355a944f055c43c54fc3cf129dd1a4e..699fbe551bb2e6a3d52b4c2d213c5600e4094391 100644 (file)
--- a/TRD/AliTRDtrackerV1.cxx
+++ b/TRD/AliTRDtrackerV1.cxx
@@ -526,6 +526,7 @@ Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t)
   
        //AliInfo("");
        Int_t    nClustersExpected = 0;
+       Float_t clength = AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick();
        Int_t lastplane = 5; //GetLastPlane(&t);
        for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
                //AliInfo(Form("plane %d", iplane));
@@ -571,7 +572,7 @@ Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t)
                //AliInfo(Form("reco %p", tracklet->GetRecoParam()));
                t.SetTracklet(tracklet, iplane, index);
                
-               t.PropagateTo(tracklet->GetX0(), xx0, xrho); // not correct
+               t.PropagateTo(tracklet->GetX0() - clength, xx0, xrho);
          if (!AdjustSector(&t)) break;
          
     Double_t maxChi2 = t.GetPredictedChi2(tracklet);
@@ -629,7 +630,6 @@ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t)
 //
 
        Int_t nClustersExpected = 0;
-
   // Loop through the TRD planes
   for (Int_t iplane = 0; iplane < AliTRDgeometry::Nplan(); iplane++) {
                //AliInfo(Form("Processing plane %d ...", iplane));
@@ -808,26 +808,21 @@ void AliTRDtrackerV1::UnloadClusters()
   Int_t nentr;
 
   nentr = fClusters->GetEntriesFast();
-       //AliInfo(Form("clearing %d clusters", nentr));
   for (i = 0; i < nentr; i++) {
     delete fClusters->RemoveAt(i);
   }
   fNclusters = 0;
-
-  nentr = fTracklets->GetEntriesFast();
-       //AliInfo(Form("clearing %d tracklets", nentr));
-  for (i = 0; i < nentr; i++) {
-    delete fTracklets->RemoveAt(i);
-  }
+  
+       if(fTracklets){
+       for (i = 0; i < fTracklets->GetEntriesFast(); i++) delete fTracklets->RemoveAt(i);
+       }
 
   nentr = fSeeds->GetEntriesFast();
-       //AliInfo(Form("clearing %d seeds", nentr));
   for (i = 0; i < nentr; i++) {
     delete fSeeds->RemoveAt(i);
   }
 
   nentr = fTracks->GetEntriesFast();
-  //AliInfo(Form("clearing %d tracks", nentr));
        for (i = 0; i < nentr; i++) {
     delete fTracks->RemoveAt(i);
   }