Error running DelphesCMSFWLite on CMS GEN-SIM file

[sarah malik]

Hi,

I'm trying to run DelphesCMSFWLite on a CMS GEN-SIM file. I've been able to do this successfully in the past, but for this file I get the following error:

Reading ICL-POWHEG_DMGG_NNPDF30_13TeV_Scalar_750_300-GEN-SIM_1.root
terminate called after throwing an instance of 'edm::Exception'

what(): An exception of category 'ProductNotFound' occurred.

Exception Message:
No branch was found for

type ='edm::Wrapper<LHEEventProduct>'
module='source'
productInstance=
process=

Abort (core dumped)

I'm using Delphes-3.3.2 and using the same version of CMSSW that was used to produce the GEN-SIM file. When I look in the root file, there is a branch called LHEEventProduct_externalLHEProducerLHE.

Thanks!
Sarah

[Michele Selvaggi]

Can you try taking the delphes HEAD?

git clone https://github.com/delphes/delphes.git

alternatively you can simply take the new version of reader/DelphesCMSFWLite:

​https://github.com/delphes/delphes/blob/master/readers/DelphesCMSFWLite.cpp

and recompile...