fixCoefNormalization warning with RooAddPdf

Roofit and RooStats
1

Dear Experts,

I encounter a warning when evaluating a RooAddPdf ("SUM::test(f[0,1]*EXPR::a('x',x),EXPR::b('1/(x+10)',x))"):

[#0] WARNING:Eval -- Evaluating RooAddPdf without a defined normalization set. This can lead to ambiguos coefficients definition and incorrect results. Use RooAddPdf::fixCoefNormalization(nset) to provide a normalization set for defining uniquely RooAddPdf coefficients!

Even after calling fixCoefNormalization() and fixAddCoefNormalization(), I still get the warning. I’ve attached a standalone example script that shows the warnings.
stanalone-fixCoefNormalization.py (1.1 KB)

Do you have any suggestions as to why the normalization set does not appear to be set? Thanks very much,
Aaron, @afortman

ROOT Version: 6.24/00
RooFit v3.60

2

Hi,
It is an issue in 6.24, but already fixed in ROOT master. See Fix printing of warning message when calling without a normalization set but fixCoefNormalization has been called by lmoneta · Pull Request #8030 · root-project/root · GitHub
We will backport the fix also in the 6.24 branch so it will be fixed for 6.24.02

Thank you for reporting it

Lorenzo

3

Hi Lorenzo,

Thanks very much for the reply. I will install a new version and check if it’s resolved.

Thanks,
Aaron

4

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