Problems adding arrays and setting active attributes
More details of my problem with the plot_graph routine posted earlier
on this list.
The error occurs when attempting to set the active attribute after
having added an array to the point_data. I've looked at lots of
examples of adding arrays, and this seems to be the way it should be
done. Certainly, if I get_array(1).name after having added it, the
array seems to be there. However it doesn't show up in the pipeline
view (and I don't know whether it should). And obviously the
set_active_attribute can't find the name. What am I missing?