diff --git a/Detector/DetCEPCv4/src/tracker/FTD_cepc_geo.cpp b/Detector/DetCEPCv4/src/tracker/FTD_cepc_geo.cpp
index 3bb1ae757..053371aac 100644
--- a/Detector/DetCEPCv4/src/tracker/FTD_cepc_geo.cpp
+++ b/Detector/DetCEPCv4/src/tracker/FTD_cepc_geo.cpp
@@ -563,6 +563,9 @@ static Ref_t create_element(Detector& theDetector, xml_h e, SensitiveDetector se
 	  {
             _dbParDisk.ZStartOuterCylinder = _z_position;
 	  }
+
+        _dbParDisk.ZStopOuterCylinder = _zEnd;
+        _dbParDisk.ZStopInnerCylinder = _zEnd;
 	break;
           
       case 7:
diff --git a/Examples/options/sim-rec-trackerecal.py b/Examples/options/sim-rec-trackerecal.py
index c3a8f6d68..49e79a931 100644
--- a/Examples/options/sim-rec-trackerecal.py
+++ b/Examples/options/sim-rec-trackerecal.py
@@ -2,6 +2,8 @@
 
 from Gaudi.Configuration import *
 
+import os
+
 NTupleSvc().Output = ["MyTuples DATAFILE='sim-rec-trackerEcal.root' OPT='NEW' TYP='ROOT'"]
 
 from Configurables import RndmGenSvc, HepRndm__Engine_CLHEP__RanluxEngine_