deletions | additions       diff --git a/section_Week_07_subsection_Tuesday__.tex b/section_Week_07_subsection_Tuesday__.tex  index 1e03201..904d1b4 100644  --- a/section_Week_07_subsection_Tuesday__.tex  +++ b/section_Week_07_subsection_Tuesday__.tex 
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\item myntuple, myiso, matching with delta_alpha... integrate!  \item why did Colin write pt > 1e-5 for the particle selection?  \end{itemize}  \subsection{Friday}  I got two times a segment violation with 5000 top events at event 3000. The error is the following one:  Traceback (most recent call last):  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/bin/heppy_loop.py", line 184, in   main(options, args)  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/bin/heppy_loop.py", line 144, in main  loop = runLoop( comp, outDir, cfg.config, options )  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/bin/heppy_loop.py", line 39, in runLoop  loop.loop()  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/framework/looper.py", line 205, in loop  self.process( iEv )  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/framework/looper.py", line 287, in process  return self._run_analyzers_on_event()  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/framework/looper.py", line 297, in _run_analyzers_on_event  ret = analyzer.process( self.event )  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/analyzers/PapasPFBlockBuilder.py", line 49, in process  blockbuilder = PFBlockBuilder(pfevent, distance, history_nodes)  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/papas/pfalgo/pfblockbuilder.py", line 69, in __init__  edge=self._make_edge(id1,id2, ruler)  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/papas/pfalgo/pfblockbuilder.py", line 93, in _make_edge  link_type, is_linked, distance = ruler(obj1,obj2) #some redundancy in link_type as both distance and Edge make link_type  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/papas/pfalgo/distance.py", line 31, in __call__  return func(ele1, ele2)   File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/papas/pfalgo/distance.py", line 56, in ecal_track  link_ok, dist = ecal.is_inside(tp)  File "/afs/cern.ch/user/n/nfoppian/work/public/FCC/heppy/papas/pfobjects.py", line 115, in is_inside  dist=(subc.position - point).Mag()  SystemError: TVector3 ::operator-(const TVector3&, const TVector3&) =>  problem in C++; program state has been reset