Hi Adrien, Thanks for the mental bandwidth on this. I don't like replying inline, but I'm going to grit my teeth and do it here - forgive me!
Cheers, D On Sat, Jan 7, 2023 at 12:47 AM Adrien Monteleone < adrien.montele...@lusfiber.net> wrote: > Christopher Lamm had been working on various aspects of the Budget > Report not long ago. He may be able to squeeze in a look at this. He'll > likely be the one to see your bug report and maybe shed light on the > math logic. > Great: https://bugs.gnucash.org/show_bug.cgi?id=798716 > If I can find some time this weekend I'll test as well. I normally don't > budget with multiple currencies, but I do use the Budget feature and > report. (looking at your screenshot, I've never done a multi-year > budget, so that will be interesting. I'll test too with a single year.) > The pragmatic way around this is to only use budget reports with a single budget period when multiple currencies are used in sub-accounts. Things then work because the starting "actual" value is always zero. > Concerning the 'roll-up', if you leave the parent blank, it should work. > (at least it does with a single currency) *But*, you can also put in a > different value manually for the parent. I'm not sure if that is in play > here or not. The parent has to be entirely blank, not just a "0" or "0.00" > > *note, this is for the Budget itself, your screenshot showed the report > result, but does the parent roll-up not work on the budget tab either? > Interesting. Here the budget and the budget report behave differently. The roll-up *does* acknowledge the change in FX rate, but behaves as I'd expect (see screenshot attached) > > With respect to the 'past-period memory', it could be buggy, but I'd be > inclined to first look really carefully at my report options, *and* the > budget period setup. (Edit > Budget Options, or Options toolbar button > once a budget is already open - different from Options button on the > report tab) I once made an odd mess here myself that produced strange > numbers that didn't make sense. > > Specifically with the Report Options, the General tab can make things > messy with respect to custom ranges, and Accounts > Account Depth can > produce odd results if not sufficiently deep, or if flattened. > Depth was enough to capture all sub-accounts and ranges were sensible (and covered all transactions). I admit it is possible to screw this up as you warn - and perhaps I still have - but I think I've picked it simply > > Additionally, did you simply manually enter all budget values, or did > you perhaps use the Estimate feature? > Manually entered. > > Finally, does this book have Trading Accounts enabled by chance? I think > I understood from your first post that you aren't using them yet. (mine > does, so I'll test with and without to see if there is difference) > No trading accounts. > > ----- > I've been in the habit of hazarding guesses lately, so here's one for > this topic: > > Since the Budget Report does not have an option for commodity price > source like other reports cognizant of other currencies, I'll > hypothesize that budgets simply aren't (yet) capable of properly working > with more than one, or any currency other than the book currency. > > Regards, > Adrien > > On 1/6/23 4:48 PM, ml enquirer wrote: > > Dear all, > > > > I've done some digging, and Gnucash totals seem to be wrongly reported > for > > budget reports with multi-currency sub-accounts. But I'm not an > accountancy > > expert at all, so perhaps someone can explain the accounting logic behind > > it? Perhaps a report that can imply 1+1=3 should have a warning note? > > Should we be ensuring that accounts add up across budget periods, or down > > hierarchies within budget periods? Gnucash is doing the former, but it's > > confusing since the display can imply only the latter is in action. > > > > I built a local copy of gnucash and tracked the calls through budget.scm > > back to the totalling and currency-conversion that happens in Account.cpp > > and I see where the confusion arises. There is memory of previous budget > > periods built into the reported totals under each asset class (see the > > detail below and the picture attached). > > > > Isn't it a bit counter-intuitive that the budget reports for 'parent' > > account values in a given budget period, don't need to add up to the sum > of > > the 'child' account values when converted by the exchange rate relevant > for > > that budget period? I give lots of detail below, where it's clear the > > report is not "buggy", but it is borderline misleading, particularly > given > > that the report can be restricted to a single budget period within which > it > > appears to say that 30,000 GBP is the sum of 10,000 GBP and 10,000 EUR, > > when the exchange rate is 1GBP = 1EUR. 1+1=3? > > > > Would love some expert input. Maybe I should report this as a bug and let > > someone set me right there? :) > > > > Cheers, > > D > > > > PS: Here's the detail: > > I expected: > > - reported actual "Groceries" total would be the sum of the reported > "GBP" > > and "EUR" account spends in that budget period, according to the relevant > > FX rate. > > > > But in reality: > > - it's actually this year's change in the balance for that account > compared > > to the last budget period. That means that while the GBP or EUR rows > always > > change by 10,000 each year, and thus always show 10,000 in the budget > > report, the sum of the two - the "Groceries" row - is not necessarily > equal > > to 10,000 GBP + 10,000 EUR. In my example, 1EUR = 0.5 GBP for the first > two > > budget periods, so the balance of "Groceries" by the end of the second > > period was (10,000GBP+5,000GBP) + (10,000 GBP + 5,000 GBP) = 30,000 GBP. > > But at the end of the third period, the three years' of spending meant > that > > the balance of "Groceries" was > > (10,000GBP+10,000GBP)+(10,000GBP+10,000GBP)+(10,000GBP+10,000GBP) = > 60,000 > > GBP. Difference 30,000 GBP. > > > > so 1 + 1 = 3. > > _______________________________________________ > gnucash-user mailing list > gnucash-user@gnucash.org > To update your subscription preferences or to unsubscribe: > https://lists.gnucash.org/mailman/listinfo/gnucash-user > ----- > Please remember to CC this list on all your replies. > You can do this by using Reply-To-List or Reply-All. >
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