[GNC] Additional check for out of balance 'Trial Balance' and 'Balance Sheet'

[Michael or Penny Novack]

> Further investigation found that in the 'Edit Account' panel, the 'Smallest
> fraction' was set at '1' on this particular account, and the amount was
> being rounded up on one side, causing the mismatch. Setting the 'Smallest
> fraction' to 'Use Commodity Value' and running 'Repair All' sorted the
> problem.
>
> I hope the above may be a solution for someone and save them time, if not
> hair.

It bears repeating, as soon as rounding is involved, exactly in balance 
goes out the window. It is simply a reality of mathematics that rounded 
A + rounded B is not necessarily equal to rounded (A + B). Your problem 
could exist even if both sides were rounded/

LOL -- in my working days, one of the things I did a number of times was 
calculate the value of the "fuzz" (the maximum discrepancy between 
calculations done in different order as a result of limits in 
precision/rounding --- so the computer program would consider the two 
equal if the difference were less than "fuzz"). And those of us doing 
calculations in science/engineering know that the order in which we do 
them can have a great effect on the possible "error" << so we choose the 
order of calculations that minimizes that >>

In its original form. double entry bookkeeping could demand exact 
balance because the only operation was addition/subtraction and no 
rounding involved.


Michael D Novack