I am performing a Minuit2 fit with a 8 parameter function by using ROOT::Math::Minimizer.
I have used “SetLimitedVariable” to set name, initial value, step and range of each parameter.
However, if I set PrintLevel to the maximum value, I can see that, at the first iteration, all parameters have the initial value that I specified except one/two, which is/are always very near (but below) the upper range value that I specified.
In which cases this behavior can happen?
_ROOT Version: 6.26/10
_Platform: gcc 10.2.1-6
_Compiler: Debian GNU/Linux 11 (bullseye)