[ROOT] Problem using Angle

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Hi All,

I have a problem using the Angle function with TLorentzVector and
TVector3 in my program.

For example if I do this at prompt of root I have:

root [1] .L $ROOTSYS/lib/libPhysics.so
root [2] TLorentzVector v
root [3] v.SetPxPyPzE(2,2,2,1)
root [4] v.Angle(v.Vect())
(const Double_t)0.000000000000000000e+00

Is my error or is a problem of root ?

I use root 4.00/04 on redhat 9.0.

Thanks
Francesco.

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