Hi experts, I'm working on transitioning to the new "systematics" module for PDF and scale reweighting, and could use a few clarifications. I'm working in version 2.5.5. 1) At NLO, just specifying 'True = store_rwgt_info' in the run_card doesn't seem to be enough for the reweight info to be stored/usable. It seems to also require 'True = reweight_scale' or 'True = reweight_PDF' to be specified. 2) Since I want to include scale weights anyway, (1) isn't really a problem. But when I try to reweight after having specified both 'True = reweight_scale,' and 'True = store_rwgt_info,' I can't figure out how to avoid having the scale weights rewritten. I tried both (a) systematics run_01 --pdf=XXX,YYY --dyn=-1 (b) systematics run_01 --pdf=XXX,YYY --dyn=-1 --together=mur,muf but in both cases I end up with a reweight block as copied below. Is there a syntax for this that I'm missing? 3) Is it possible to specify the ID (or starting number) of the weight? The way the previous on the fly NLO weighting switched from 1XXX to 2XXX for scale weights to PDF weight was kind of useful if the number of scale weights being stored is variable. Thanks! Kenneth dyn= -1 muR=0.10000E+01 muF=0.10000E+01 dyn= -1 muR=0.20000E+01 muF=0.10000E+01 dyn= -1 muR=0.50000E+00 muF=0.10000E+01 dyn= -1 muR=0.10000E+01 muF=0.20000E+01 dyn= -1 muR=0.20000E+01 muF=0.20000E+01 dyn= -1 muR=0.50000E+00 muF=0.20000E+01 dyn= -1 muR=0.10000E+01 muF=0.50000E+00 dyn= -1 muR=0.20000E+01 muF=0.50000E+00 dyn= -1 muR=0.50000E+00 muF=0.50000E+00 MUR=0.5 MUF=0.5 MUR=0.5 MUR=0.5 MUF=2.0 MUF=0.5 MUF=2.0 MUR=2.0 MUF=0.5 MUR=2.0 MUR=2.0 MUF=2.0 # scale

When	Who	Action	New State
2017-08-01	Olivier Mattelaer	Answer	Answered
2017-08-01	Kenneth Long	Comment	Answered
2017-08-02	Olivier Mattelaer	Answer	Answered
2017-08-02	Rikkert Frederix	Answer	Answered
2017-08-02	Rikkert Frederix	Comment	Answered
2017-08-02	Kenneth Long	Confirm	Solved

MadGraph5_aMC@NLO

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