Output command not creating files needed for launch

Asked by Ciara Byers on 2019-09-04

Dear MadGraph team,

I have been having some difficulty getting MadGraph to run correctly. Specifically it does not seem to produce all of the files needed when using the 'output' command, so then 'launch' doesn't produce everything that it should. The only errors I get are when I try to access a subprocess via the html interface and it gives me a 'file does not exist or has been moved' error. It does not do this for all of them though, usually just one or two.

I've just kept it simple, e- e+ > e- e+ , but it still happens.

I've also found it to be very unhappy when I import a 2HDM model and try to do the same process in that. The model is just the 2HDM_UFO that can be found on the feynrules 2HDM page. It has been running e+ e- > e- e+ for about half an hour with no results.

Perhaps these issues are separate? I'm very confused, I tried reinstalling madgraph and I have the same problem, I've been trawling through the files trying to figure out where the files are created to see if there's an error there somehow, but I haven't found anything. If you could point me in the right direction I'd be very grateful!

Question information

Language:
English Edit question
Status:
Open
For:
MadGraph5_aMC@NLO Edit question
Assignee:
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Last query:
2019-09-06
Last reply:
2019-09-04

Hi,

> The only errors I get are when I try to access a subprocess via the html interface and it gives me a 'file does not exist or has been moved' error. It does not do this for all of them though, usually just one or two.

This might just be a bug in your web browser. We have filled a bug report in 2012 to the chrome framework about it. This bug has been faced by many other devellopers using html on a local file system. But they did not want to fix it. It is possible that firefox decides to do the same in 2018.
So please complain to them.

In any case html issues like that have 0 impact on how the code runs.

> It has been running e+ e- > e- e+ for about half an hour with no results.

What cut did you put? I do not know the 2HDM, but already such cross-section is infinite if you do not put cut on the final state. Not surprinsingly computing infinite cross-section is something that is not well optimsed.

If i just kept the default cut, I have results in less than 60s:

     Cross-section : 42.85 +- 0.05455 pb
     Nb of events : 10000

Cheers,

Olivier

> On 4 Sep 2019, at 18:57, Ciara Byers <email address hidden> wrote:
>
> New question #683640 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/683640
>
> Dear MadGraph team,
>
> I have been having some difficulty getting MadGraph to run correctly. Specifically it does not seem to produce all of the files needed when using the 'output' command, so then 'launch' doesn't produce everything that it should. The only errors I get are when I try to access a subprocess via the html interface and it gives me a 'file does not exist or has been moved' error. It does not do this for all of them though, usually just one or two.
>
> I've just kept it simple, e- e+ > e- e+ , but it still happens.
>
> I've also found it to be very unhappy when I import a 2HDM model and try to do the same process in that. The model is just the 2HDM_UFO that can be found on the feynrules 2HDM page. It has been running e+ e- > e- e+ for about half an hour with no results.
>
> Perhaps these issues are separate? I'm very confused, I tried reinstalling madgraph and I have the same problem, I've been trawling through the files trying to figure out where the files are created to see if there's an error there somehow, but I haven't found anything. If you could point me in the right direction I'd be very grateful!
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Ciara Byers (ciarab93) said : #2

Thanks for getting back to me so quickly.

When I look in the folder for the files the web browser needs some of them are indeed missing, surely that is caused by MadGraph not creating everything during output?

I used the default cut, for the sm I now get 40.32 +- 0.058pb in 0.82s, this seems fine.
For the 2HDM model with the same cut I get 44.26 +- 0.05273pb in 0.94s also seems fine.

But even after removing and redownloading the model I have missing subprocess files after launch.

Do you think this is a model issue, and if so, do you have any idea of where I ought to look for it?

Thanks,
Ciara

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