Hi Matt, The M and M2 functions have always been and still are in TLorentzVector. Try the following in an interactive session: root > gSystem->Load("libPhysics"); root > TLorentzVector junk(1,2,3,4); root > junk.M() root > junk.M2() Rene Brun Matthew Bellis wrote: > > Hi Root users, > > I recently installed v3.00.06 on my Debian machine. I used the > linuxdeb2 architecture for configure, but I changed the compiler to gcc, > instead of egcc. > > I am finding though that I cannot access the M() or M2() member > functions of a TLorentzVector. I have tried filling the Vector a number > of ways, but it always hangs the program when I try to acess these > functions. > > Has anyone else encountered this problem? It used to work fine with > v2.23. Otherwise the newer version seems to be fine. > > Matt Bellis > RPI
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