You could try something like:
=IF(OR(COUNTIF(A:A,A1)>1,COUNTIF(B:B,B1)>1,COUNTIF(C:C,C1)>1,COUNTIF(D

,D1)>1),"Duplicate
Value","")
for row 1 and drag down
Regards
Trevor
"Daren" <(E-Mail Removed)> wrote in message
news:6AFDD357-D7CF-4BF7-80E8-(E-Mail Removed)...
>I have 4 distinct columns that need to be anlalyzed for duplicate data
>using
> conditional formats. I want to write a function that will look at each
> value
> in the columns and determine if there are duplicates and overlap in times.
> Column A has serial number, column B has city name, and column C and
> column D
> have times. I want to find duplicates in column A and also in columns B,
> C
> and D to check for any errors. For example, in the first record column A
> has
> 0011, column B has Chicago in it, column C has 10:45 in it, and column D
> has
> 11:30 in it. In the second record, column A has 0011, column B has
> Chicago
> in it, column C has 11:00, and column D has 12:00 in it. As you can see,
> the
> values in A are the same, which is not supposed to occur, so I know I
> would
> need a conditional format for that. But there is also duplication in the
> city name, and finally, overlap in the times. Is there a
> formula/conditional
> format I can use to look at all these 4 data items and only sort it once
> to
> bring all errors to the top? Thanks.