ZeroDivisionError in SingleTopReconstruction

[marco-link]

== CMSSW: Processed    10000/   53459 entries, 18.71% (elapsed time    22.5s, curr speed    0.444 kHz, avg speed    0.444 kHz), accepted        4/   10001 events ( 0.04%)
== CMSSW: Processed    20000/   53459 entries, 37.41% (elapsed time    33.3s, curr speed    0.926 kHz, avg speed    0.600 kHz), accepted        8/   20001 events ( 0.04%)
== CMSSW: Processed    30000/   53459 entries, 56.12% (elapsed time    41.5s, curr speed    1.224 kHz, avg speed    0.723 kHz), accepted       11/   30001 events ( 0.04%)
== CMSSW: Traceback (most recent call last):
== CMSSW:   File "ST.py", line 454, in <module>
== CMSSW:     p.run()
== CMSSW:   File "/srv/CMSSW_11_1_7/python/PhysicsTools/NanoAODTools/postprocessing/framework/postprocessor.py", line 234, in run
== CMSSW:     eventRange=eventRange, maxEvents=self.maxEntries
== CMSSW:   File "/srv/CMSSW_11_1_7/python/PhysicsTools/NanoAODTools/postprocessing/framework/eventloop.py", line 78, in eventLoop
== CMSSW:     ret = m.analyze(e)
== CMSSW:   File "/srv/CMSSW_11_1_7/python/PhysicsTools/NanoAODTools/modules/SingleTopReconstruction.py", line 151, in analyze
== CMSSW:     cosWhel = leptonInWbosonRestframe.Vect().Dot(topInWbosonRestframe.Vect())/leptonInWbosonRestframe.Vect().Mag()/topInWbosonRestframe.Vect().Mag()
== CMSSW: ZeroDivisionError: float division by zero

when running over /store/user/mlink/WbChargeReco/2022-08-24_v12/mc_2017/QCD_Pt-800To1000_MuEnrichedPt5_TuneCP5_13TeV-pythia8/WbChargeReco_mc_2017_2022-08-24_v12/220824_154419/0000/nanox_823.root