Opening root file containing roodataset

ROOT
1

Hi,

I have a fairly basic question. I’m trying to open a root file containing roodataset but I get a list of the following warnings and then I can’t see the RooPlots.
Warning in TClass::TClass: no dictionary for class RooDataSet is available
Warning in TClass::TClass: no dictionary for class RooAbsData is available
Warning in TClass::TClass: no dictionary for class RooTreeDataStore is available

I’m running root version 5.18 and haven’t done any ‘installation’ of Roo objects… Do I need to install all the RooDataSet stuff?

Thanks
Sarah

2

Hi,

In v5.18, you probably need to explictly load the roofit library (gSystem->Load(“libRooFitCore”); )

Cheers,
Philippe.