I could be wrong, but I think that sagenb.org has a timeout on all
computations, which may be different than any timeout due to idleness. It
may reset everything every 10 minutes or so, to prevent long-running or
otherwise intensive computations from using up all of the resources on the
server.

So I think might be a "feature", not a bug. If it happens on a local
notebook server that wasn't intentionally setup this way, then I think that
would be a bug.

On Thu, Aug 25, 2011 at 10:01 PM, VictorMiller <victorsmil...@gmail.com>wrote:

> I'd been running some computations on sagenb.org which involved
> (implicitly) asking Singular to make some groebner basis
> calculations.   I was never able to complete it because it would
> eventually appear to finish, but at that point it acted as though the
> worksheet was restarted (and silently -- at least if it were going to
> do this it would be nice to have a message).  Upon reading some posts
> today I realized that this was happening because of a timeout
> parameter in the notebook.  However, if I'm in the middle of a
> calculation I'm not idle!  I understand that because the calculation
> is being farmed out to Singular it might look like SAGE is idle, but
> it isn't.  Should there be a trac ticket for this?
>
> Victor
>
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