on my solaris-server, there has been a newer version of this module. but even with the older version, there occurs this error. always at the beginning of this if-block:

    if (defined $np && defined $ds)
    {
        return @{$self->{_hotspots}->[$ds]->[$np]};
    }
    elsif (defined $ds)
    {
        return @{$self->{_hotspots}->[$ds]};
    }
    else
    {
        return @{$self->{_hotspots}};
    }
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the values of $ds and $np are correct and valid.