[Rivet] Rivet 2.4 and xsec/event counter information

[David Grellscheid]

On 10/11/15 10:44, Andy Buckley wrote:
> On 10/11/15 09:02, David Grellscheid wrote:
>> Won't that still work? Let's say you originally have events numbered
>>
>> E 1 ...
>> E 452 ...
>> E 1642 ...
>>
>> and you leave out the middle one, you still get the correct "number of
>> attempts" from the third event.

[...]

> Because of this, maybe the min event number should be written into a 
> header, or runs always declared to start at 1. I'm not sure if the 
> latter would work for experiment procedures, but I *think* it is 
> currently the case in ATLAS.

The count of attempts needs to be defined to start at one, but the first
event written is almost never 'E 1'.

  David