Thanks for your reply.  I now understand and I also agree it is a good solution.

Best,
Ruy

On Nov 15, 2017 19:54, "Nicolas Goaziou" <mail@nicolasgoaziou.fr> wrote:
Ruy Exel <ruyexel@gmail.com> writes:

> Thanks very much.  Just out of curiosity I'd be interested in understanding
> how did you do it.  My (non expert) impression is that using properties to
> override column formulas isn't a good idea.

The property is here to prevent evaluation of a column formula on
a given field. It doesn't override anything.

> It seems to me it would be more natural to apply cell formulas AFTER
> all column formulas were applied, so that each cell would be simply
> the output of the formula defining it.

This is what happens already. The property prevents useless
computations.

Regards,