Problem launch p p > z > e+ e- [QCD]

Hi,

First, is this really the syntax that you want?
This syntax breaks gauge invariance in a large part of the phase-space since you do not include
the interference term with the photon contribution when the Z is off-shell.

If you are only interested in the on-shell contribution, I would suggest to run the following code
generate p p > Z
output
launch
madspin=ON
decay Z > e+ e-

If you are interested in the off-shell contribution as well, then you should use
generate p p > e+ e-
output
launch

Now I do not reproduce your issue. It seems that you have some issue with the validation of the NLO accuracy. Can you run in debug mode such that we will have more information about which tests fails.
This might be a "random" effect related to the fact that the random PS point used for the check is quite off-shell and then you face issue of gauge invariance.

Cheers,

Olivier

> On 15 Jan 2019, at 17:22, SOUMYA MUKHERJEE <email address hidden> wrote:
>
> New question #677809 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/677809
>
> Dear MadGraph expert,
> I am testing a process
> generate p p > z > e+ e- [QCD]
> the process is running well and shows the feynman diagrams for NLO QCD. But while launching the process by -> launch `process name`.
> I got some errors. From run_tag_debug.log I am giving the error line.
>
>
> IOError: [Errno 2] No such file or directory: '/home/soumya/MG5_aMC_v2_6_4/NLOz/SubProcesses/P0_uux_z_epem/test_ME.log'
> Related File: /home/soumya/MG5_aMC_v2_6_4/NLOz/SubProcesses/P0_uux_z_epem/test_ME.log
>
>
> Yours sincerely,
> Soumya
> TIFR
>
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