Solution to Error: count first instance of number in column

count first instance of number in column

Row D contains series of numbers.
From column AP, I need to evaluate the cell in column D (same row) and if that number appears for the first time, count "1".
If it is repeated (more than once) count "0".

Anwsers to the Problem count first instance of number in column

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In AP1: =--(COUNTIF(D$1:D1,D1)=1)
Fill down as far as needed.

Windows Error Reporting - To Fix count first instance of number in column

1. Go to Start button.
2. Open Control Panel.
3. Go to Windows Error Reporting.
4. Click on System and Maintenance, then click Problem Reports and Solutions.
5. Next, click Change Settings located on the left side panel of the Problem Reports and Solutions window.
6. Select an option to configure how you want Windows to look for a solution to your problems. You may allow Windows to do it automatically or ask you every time to check if problem occurs.
7. Next, click the Advanced settings link.
8. Select Off to turn off Error Reporting.

Recommended Method to Repair the Problem: count first instance of number in column:

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