[Users] output not overwritten anymore?

[Christian Reisswig]

Hi Roland,

thanks for the fix! It works again for me!

cheers,
Christian

> Hello Christian, Erik, Ian, all,
> 
> > CarpetIOScalar has a new parameter all_reductions_in_one_file. This
> > parameter is used near the checks for truncating. Can you check the
> > behaviour from before this parameter existed?
> 
> It should work again now. I tested all four combinations of
> io::truncate_files and carpetioscalar::all_reductions_in_one_file and
> they seem to reproduce the old behaviour. A unfortunate side effect of
> this, is that no header is written when the set of reductions is changed
> in the course of a checkpoint-and-recovery operation. The only way would
> seem to checkpoint the per-variable settings (unless it is possible to
> ask the flesh for parameter values pre and post checkpoint recovery).
> 
> The underlying error was not properly realising that do_truncate[] is a
> per-Cactus-variable vector, rather than a per-output-file vector.
> Truncation worked for the very first reduction (average in my case),
> which likely contributed to me to not noticing earlier.
> 
> Yours,
> Roland