Jerry, thank you very much for your quick response, and your suggestion
worked. I guess I was getting hung up on using the round function and never
thought of using absolute number instead

Thanks again
Carl
:-)

"Jerry W. Lewis" wrote:

If I135 and J135 were really identical you would not be getting "ERROR"
=(I135-J135)
will show you the difference that Excel is keying on.

How close do they need to be? Try something like
=IF(ABS(I135-J135)<0.001,"OK","ERROR")
Replace 0.001 with a suitably small number for your context.

Jerry

"carl" wrote:

I have a formula that reads =IF(I135-J135=0,"OK","ERROR")

I can see that the figures in cells I135 & J135 are identical so I should
get a return of "OK" but I get "ERROR" instead. Could be something to do
with rounding ? if so how do I amend the formula to cope with this. (Note, I
have the same formula on two other worksheets in the same workbook, and they
both work fine !)

any suggestions, greatly appreciated