[Rivet] sherpa/hepevt issue

[Andy Buckley]

Jonathan Butterworth wrote:
> Dear riveters,
> 
> Vladimir Savinov in ATLAS recently found that there is a hard-coded 
> HEPEVT in Sherpa which has length 4000. The fortran generators we link 
> in rivet use 10000 (as does ATLAS). The sherpa authors are aware, I 
> believe, and hopefully this will be fixed (at least a Genser build with 
> 10000 should be provided).

That's good to know... thanks.

> It may not affect us, but these things lurk and the common block issue 
> has bitten us before, so I thought I had better tell you just in case. 
> For instance, if fortran generators suddenly break when you build rivet 
> with a sherpa interface...

Funny you should say that! That was why I rewrote the whole generator
loader system to be more sparing about when it used dlopen - to avoid
opening Sherpa and hence screwing up all the Fortran generators!

Andy