[GNC] Evil Lots Behavior

[David Carlson]

It could be very helpful to learn if this started in a recent release, or
has it been that way since back in the 3.x series.

On Wed, Jul 20, 2022 at 8:54 AM David T. via gnucash-user <
gnucash-user at gnucash.org> wrote:

> Hello,
>
> In the course of catching up with my accounting, I've been working
> extensively with mutual fund holdings, and their buys and sells. I have
> found a disturbing bug in the way that the lots feature handles existing
> gains.
>
> Specifically, the software recalculates ALL gains in a lot the moment you
> select that lot. A user does not have to try and change anything in the
> lot; the mere act of selecting the lot causes every gain entry to be
> recalculated. The recalculation silently takes place without notice to the
> user, and it recalculates gains entries that have already been reconciled.
> Sometimes, the value on the reconciled gain transaction will be changed; at
> other times, new gains entries get created. I haven't figured out why a new
> entry is created sometimes, and the existing entry gets changed at others.
>
> This is highly problematic. It means that users cannot rely on lot-managed
> accounts having accurate gains information, and its silent action means
> that the user will not know why their accounts were accurate at one point,
> but not later on.
>
> To see this in action, create a mutual fund account, add a purchase of 100
> shares. Sell 25 shares at a different price, and then use the lots features
> to assign the purchase and then the sale to a lot. Gnucash will
> automatically create the gain transaction. Now, change the gain value in
> the transaction to something else. Reconcile the account, including the
> gains entry. Now, return to the lot window and select the lot. The gains
> will be recalculated-- even though the gain is already reconciled.
>
> If others confirm my observations, I'll file a bug.
>
> David T.
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-- 
David Carlson