Try this drill.

< i draft this for 2 hours

....its best when u place a conditional format on all cells : cell value is
equal "=$a$1"

Open excel, open a virgin workbook *Book1.xls* ..

On sheet1,make a clockwise series of *=(next cell along sheet edges)*
a) put any number on A1
b) on B1, type *=A1*, copy B1, paste until IV1
c) on IV2,type *=IV1*, copy and paste down to IV65536
d) on IU65536,type *=IV65536*, copy and paste towards A65536
e) on A65535,type *=A65536*, copy and paste up to A2....ctrl+save as: with
any file name...

then make a counterclockwise series of *=(next cell along another range
edges)*
choose an inner-range like C3:IT65534 <3 cells o/s from the sheet edges
a) put any different number on C3 and place *=(next cell)* formula in a
counter-clockwise direction until you stop on D3...ctrl+s

---as you see there are no circular formulation *Yet* from the above...

then
a)go to toolsoptionscalculation tab click *automatic* click *iteration*
put value of 1 (e.g.) .
b) on A1, put *=A2* <now theres a circular clockwise formula wave along the
sheet edges.
c) on C3, put *=A1 <now there's the counterclockwise formula on the inner
range with cell values that must be equal to the value on the *edges*. But
this innerrange is not in a circular formula with itself..
* observe the result along the bottom-right corner of the innerrange,you can
see the start of *iterated result(s)*...
*Exit excel with file save as something like "DIR1/step1.xls.
*Re-open Excel, open the saved file, <the differences are still there.
Now i know that iteration mode governs the basic automatic mode.

Then try to file save_as something like "*DIR2/step1.xls
a) on A1, put any number <delete *=A2*, now there's no circular
formulation. *All values now are equal to A1*
b) then again on A1, put *=A2* <now there's a circular clockwise formula
activated along the sheet edges.
*You can see that max&min values are All-Equal in an instant!!!

But when you try this...

a) on C3, place any DIFFERENT number <delete the *=A1*.
*u see the non-circular innerrange of cells react very fast with equal
values as in C3..
b) then again on C3, put *=A1*
You can see the same results from the first procedure.


For bothe files, having same filename, and residing on different directory,
if i close and open them both at the same time under one window...which one
will someone select?
*I may also forget which one is correct!

Assuming that if the *last formulated cell *D3* is linked on other
formulated report sheet of the same workbook...its a nightmare..

I may have numbered results without *errors* yet

Now i'm not sure which one from the two files is the Properly Entered
iteration formula with *correctly SAVED* result.

Maybe, these automatically saved sheets can be interpreted as *same* for all
*function and template_sheet* users <who have no knowledge of which cell has
to be edited in the last place

If this drill reacts differently with yours, then i may need to dump this
very slow and dummy PC or claim for my stupidity.<g


Thanks for any advices.

--
regards,
driller

*****
- dive with Jonathan Seagull