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Re^2: how to localise a problem?

by Dave Howorth (Beadle)
on Nov 27, 2012 at 12:24 UTC ( #1005845=note: print w/ replies, xml ) Need Help??


in reply to Re: how to localise a problem?
in thread how to localise a problem?

Thanks for that. Do you have any links to reports about Graphviz crashes with similar messages? That could be very helpful.

Most of my graphs are pretty small (less than ten nodes). And which one fails seems to be random, and more importantly, it works perfectly and is not unusual when it is retried. So I don't think it is a data-dependent Graphviz error. The dot files look sensible.

FWIW, here's where I mess with Graphviz

    $self->{graph} = GraphViz2->new(
                    global  => {
                        name    => 'fold_graph_map',
                    },
                    node    => {
                        fontsize => 10,
                        shape    => 'box',
                    },
                );

stuff adding nodes and edges omitted

    eval {
        $self->{graph}->run(format  => 'png');
        $png   = $self->{graph}->dot_output();
    };
    die "Failed to create png for node #$id:\n$@\n"
        . $self->{graph}->dot_input()
      if $@;


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