MadGraph5_aMC@NLO

job fails with "An error occurred during the collection of results"

Asked by Thor Taylor

I am using version 2.2.2 of the code
I have an error with the process p p > l+ l+ vl vl j j QED=6 QCD=2 [QCD] (i.e. Both EWK and QCD production modes included)
Notably, both the EWK (QED=6, QCD=0) and QCD (QED=4,QCD=2) process work when generated separately.
I've turned off the pole check (because the EWK production mode fails it); I realise that the missing loop diagrams may lead to incorrect results, though I think the effect will be small in the region of phase space I am looking at.

When I launch the production, I get the error message "aMCatNLOError : An error occurred during the collection of results", with 0/2100 jobs "correctly terminated".
When I looked at (a random sampling of) the log files, they all ended with this error:
 Error in computation of bpower:
  not an integer 1.9979664912801929
(the actual value of the non-integer varied slightly between log files).

Question information

Language:
English Edit question
Status:
Answered
For:
MadGraph5_aMC@NLO Edit question
Assignee:
marco zaro Edit question
Last query:
Last reply:
Revision history for this message
marco zaro (marco-zaro) said : 		#1

Hi Thor,
with the current version of MG5_aMC@NLO, you can only compute processes when all born diagrams have the same couplings (or at least the same powers of QCD couplings). A version which will be capable to handle the so-called mixed-coupling expansion is currently WIP...
So for the moment one has to live with this limitation...
Let us know if you need further informations..
Cheers,

Marco

Revision history for this message
Thor Taylor (pierrethor) said : 		#2

Hi Marco,

Thanks for the prompt response. You mention that including this is a WIP;
is there an estimate of when this functionality will be included?

Cheers,
Thor

On Thu, Mar 12, 2015 at 7:21 PM, marco zaro <
<email address hidden>> wrote:

> Your question #263547 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/263547
>
> Status: Open => Answered
>
> marco zaro proposed the following answer:
> Hi Thor,
> with the current version of MG5_aMC@NLO, you can only compute processes
> when all born diagrams have the same couplings (or at least the same powers
> of QCD couplings). A version which will be capable to handle the so-called
> mixed-coupling expansion is currently WIP...
> So for the moment one has to live with this limitation...
> Let us know if you need further informations..
> Cheers,
>
> Marco
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
>
> https://answers.launchpad.net/mg5amcnlo/+question/263547/+confirm?answer_id=0
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/mg5amcnlo/+question/263547
>
> You received this question notification because you asked the question.
>

Revision history for this message
marco zaro (marco-zaro) said : 		#3

Hi Thor,
the timescale of this is of order of months, it will be released together
with the possibility of computing EW corrections on which we are working.
Cheers,

Marco

Marco Zaro

On Fri, Mar 13, 2015 at 8:16 AM, Thor Taylor <
<email address hidden>> wrote:

> Question #263547 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/263547
>
> Status: Answered => Open
>
> Thor Taylor is still having a problem:
> Hi Marco,
>
> Thanks for the prompt response. You mention that including this is a WIP;
> is there an estimate of when this functionality will be included?
>
> Cheers,
> Thor
>
> On Thu, Mar 12, 2015 at 7:21 PM, marco zaro <
> <email address hidden>> wrote:
>
> > Your question #263547 on MadGraph5_aMC@NLO changed:
> > https://answers.launchpad.net/mg5amcnlo/+question/263547
> >
> > Status: Open => Answered
> >
> > marco zaro proposed the following answer:
> > Hi Thor,
> > with the current version of MG5_aMC@NLO, you can only compute processes
> > when all born diagrams have the same couplings (or at least the same
> powers
> > of QCD couplings). A version which will be capable to handle the
> so-called
> > mixed-coupling expansion is currently WIP...
> > So for the moment one has to live with this limitation...
> > Let us know if you need further informations..
> > Cheers,
> >
> > Marco
> >
> > --
> > If this answers your question, please go to the following page to let us
> > know that it is solved:
> >
> >
> https://answers.launchpad.net/mg5amcnlo/+question/263547/+confirm?answer_id=0
> >
> > If you still need help, you can reply to this email or go to the
> > following page to enter your feedback:
> > https://answers.launchpad.net/mg5amcnlo/+question/263547
> >
> > You received this question notification because you asked the question.
> >
>
> --
> You received this question notification because you are a direct
> subscriber of the question.
>

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