... clear A1 (using the space bar),

Aha, that's the culprit <g. Do not use the space bar to clear cells, always
use the Delete key instead.

But just for the record, we could of course, make it more robust against
such "practice" (clearing cells by using the spacebar) by wrapping TRIM()
around the key col A in the formulas in col K in Sheets 1 - 4. TRIM will
remove the "invisible" white spaces. (But it's always better not to use
spacebar to clear cells.)

For example:

Instead of in Sheet1's K6:
=IF(A6="","",ROW(A1))

we could use:
=IF(TRIM(A6)="","",ROW(A1))

then copy down as before

It should work fine now ..
--
Max
Singapore
http://savefile.com/projects/236895
xdemechanik
---
"jjjam" wrote in message
...
Auto calc was enabled, but thanks for bringing that to my attention.

Here's what I'm seeing: Assume I have data in sheet1:A1 thus creating an
entry in the Summary sheet. If I go back and clear A1 (using the space
bar),
then A1 in the Summary sheet goes blank (which is good), but B1 and C1 of
the
Summary remain. It was my understanding that if A1 is blank, then no
entry
would be made on the summary, thus I shouldn't see anything in B1 and C1
on
the Summary sheet. Am I correct?

As always, thanks for your help, you're amazing.