# Unique filter function yielding the wrong total count?

#### peeblescd

##### New Member
Hi everyone, I'm using a function where the total count is a different result to what I get when manually filtering using the same criteria. This is a sample of the dataset:

 Session 1 Startup Arabic Yes sun@gmail.com Session 1 Startup Arabic Yes stars@gmail.com Session 1 Startup Arabic Yes earth@gmail.com Session 1 Startup Arabic Yes mars@gmail.com Session 2 Startup Arabic Yes sun@gmail.com Session 2 Startup Arabic Yes jupiter@gmail.com Session 2 Startup Arabic Yes pluto@gmail.com Session 1 Startup English Yes pluto@gmail.com Session 2 Startup English Yes mercury@gmail.com

The goal is to count the unique number of individuals (using the email address as the unique identifier) who participated in either Startup Arabic OR Startup English. All individuals in this sample dataset have participated (denoted by "Yes" in column C). In the full dataset, there is the possibility of "No" in column C to denote those who didn't attend. The full dataset contains about 25,000 rows. When I use the below formula, I get a result of 1,272:

=IFERROR(ROWS(UNIQUE(FILTER('All Session Data'!\$G:\$G,IFERROR(FIND("Startup",'All Session Data'!\$B:\$B)>0,0)*('All Session Data'!\$C:\$C="Yes")),0)))

However, when I manually filter the data, I get a result of just 1,127. To filter, I first filter column B to include Startup Arabic and Startup English. Then, I filter column C to be "Yes", and finally, I remove the duplicates from the resulting list of email addresses.

I can't figure out why manually filtering versus using the above formula is yielding such a different result. If anyone could give some advice as to what might be wrong with the formula, I'd really appreciate it.

#### peeblescd

##### New Member
It is a valid formula. I copied and pasted it directly. I changed the formula to what you've written and got the same result of 1,272

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#### Peter_SSs

##### MrExcel MVP, Moderator
It is a valid formula.
Hmm, here is what I get when I copy/paste from your post

and when I click OK to the message the cursor is positioned where the second IFERROR argument 'value_if_error' should be:

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