This is an array formula, and must be entered using Control + Shift + Enter (CSE). When given a range of cells (an array of cells) ISERROR function will return an array of TRUE/FALSE results. In the example, this resulting array looks like this: {FALSE;FALSE;FALSE;FALSE;FALSE;TRUE;FALSE;FALSE} Note that the 6th value (which corresponds to the 6th cell in the range) is TRUE, since cell B9 contains #N/A. The MATCH function is configured to match TRUE in exact match mode. It finds the first TRUE in the array created by ISERROR and returns the position. If no match is found, the MATCH function itself returns #N/A.

Finding the first NA error

The formula above will match any error. If you want to match the first #N/A error, just substitute ISNA for ISERROR:

Dave Bruns

Hi - I’m Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.