Comment 4 for bug 1218842

Hi,
I don't know, I have the same question. Olivier could you explain?
Thanks.
Cheers.
Paolo

On Oct 14, 2013, at 6:04 PM, Pavel Demin <email address hidden> wrote:

> Hi,
>
> Why it's changed to invalid?
>
> --
> You received this bug notification because you are a bug assignee.
> https://bugs.launchpad.net/bugs/1218842
>
> Title:
> STDHEP files larger than 4GB are corrupted
>
> Status in The MadGraph Matrix Element Generator version 5:
> Invalid
>
> Bug description:
> I've just tested several STDHEP files produced by MG+HERWIG6.
>
> I've tested 50MB, 3.3GB and 4.0GB files.
>
> The 50MB and 3.3GB files can be read without any problem.
>
> The 4.0GB file can't be read.
>
> In the 4.0GB file, already the 2nd block has a block ID number equal
> 2. Normally, it should be 4 (Event Header). The following blocks have
> completely wrong block ID numbers. So, I'd say that it's corrupted
> from the very beginning.
>
> In some cases, adding the following compilation flag helps:
>
> -D_FILE_OFFSET_BITS=64
>
> Normally, the STDHEP library and maybe the PYTHIA and HERWIG
> interfaces should be compiled with this flag.
>
> If you can tell me where to put this flag, I can redo the test.
>
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