symfact.dat FileNotFoundError

Looks like your instalation of gfortran is corrupted.
I would advise to un-install gcc (if install) and gfotran.
Then re-install gfortran (only gfortran) from
http://hpc.sourceforge.net/ <http://hpc.sourceforge.net/>

Cheers,

Olivier

> On 13 Feb 2021, at 13:01, Sihyun Jeon <email address hidden> wrote:
>
> New question #695516 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/695516
>
> Hi Olivier,
>
> I am suddenly facing this error with MG5v2.8.2:
> FileNotFoundError : [Errno 2] No such file or directory: '/Users/shjeon/Work/Generator/MadGraph/MG5_aMC_v2_8_2/PROC_sm_1/SubProcesses/P1_qq_z/symfact.dat'
>
> With simple p p > z, z > e+ e- process. I recently updated my MAC and Catalina 10.15.7 and I am suspecting this might be the reason why...
>
> I tried recommendation in [1], and the last command you provided :
>> lldb ./gensym
> then type “run”
>
> this gives me :
>
> Process 12632 launched: '/Users/shjeon/Work/Generator/MadGraph/MG5_aMC_v2_8_2/PROC_sm_0/SubProcesses/P1_qq_ll/gensym' (x86_64)
> dyld: Library not loaded: /usr/local/Cellar/gcc/10.2.0/lib/gcc/10/libquadmath.0.dylib
> Referenced from: /usr/local/opt/gcc/lib/gcc/10/libgfortran.5.dylib
> Reason: image not found
> Process 12632 stopped
> * thread #1, stop reason = signal SIGABRT
> frame #0: 0x00000001048e9ede dyld`__abort_with_payload + 10
> dyld`__abort_with_payload:
> -> 0x1048e9ede <+10>: jae 0x1048e9ee8 ; <+20>
> 0x1048e9ee0 <+12>: movq %rax, %rdi
> 0x1048e9ee3 <+15>: jmp 0x1048e8408 ; cerror_nocancel
> 0x1048e9ee8 <+20>: retq
> Target 0: (gensym) stopped.
>
>
> Is there any possible way I can solve this?
>
>
> [1] https://bugs.launchpad.net/mg5amcnlo/+bug/1782249
>
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