TProfile error with 1 entry: 32 vs 64 bits

Hello,

I noticed that the TProfile error assigned on a bin with 1 entry only is:

  • exactly 0. with root 5.21, 5.24 on 64 bits linux machines (or it seems also with root 5.21, 5.24 on MacOS).
  • something like 10-9 with root 5.21, 5.24 on 32 bits linux machines.

The 2nd case will screw up a fit on this TProfile…
Is that due to root, or to the compiler, or… ?
Thanks,

S.

read : root.cern.ch/root/html/TProfile. … etBinError

Rene