[Gdh_lowq2] question about electron mass in the cooked file

[Xiaochao Zheng]

Dear All:

I am trying to redo some of my exclusive channel analysis. But I noticed that the electron mass in the hbook file is not correct.  I am looking at for example 

/work/clas/infn1/eg4/ntuple/pass1/3GeV/ntp_50801_pass1.a00.hbook

Instead of the square of 0.5MeV, the m(1) in the event is now negative, giving false results for kinematic evaluation.

I am just wondering if anyone else noticed the same problem?  The weird thing is I did not change my code and the hbook file is dated 2009, but I definitely did not have this problem in 2011 the last time I analyzed the data.

Does the negative value always indicate it is an electron?  Should I assign the value by hand?

Any insight about what's going on here will be appreciated.  Thanks,

Xiaochao