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I'm running into a ridiculous problem in Excel 2010 where I cannot seem to use a named range whose name begins with "Corona" in a chart. I've created a new workbook with a simplified version of the problem.

I have two worksheets which contain simple bar charts. I also have a sheet named "Data" with the following table:

      A     B
1 | ONE   | 1 |
2 | TWO   | 2 |
3 | THREE | 3 |
4 | FOUR  | 4 |
5 | FIVE  | 5 |

There are four named ranges in the workbook. The two "Names" ranges are identical and the two "Values" ranges are identical:

Brea_Names    : =Data!$A$1:$A$5
Corona_Names  : =Data!$A$1:$A$5
Brea_Values   : =Data!$B$1:$B$5
Corona_Values : =Data!$B$1:$B$5

On the Brea Chart sheet, if I highlight the series then press Enter, everything works fine. On the Corona Chart sheet, if I highlight the series and change every "Brea_Names" to "Corona_Names", or change "Brea_Values" to "Corona_Values", I cannot press Enter. I don't get any error message; it's as though I didn't press Enter at all.

I got around it by naming everything "ItsCorona" instead, but this still doesn't make sense to me. What's wrong with the name "Corona"?

The test file can be downloaded here:

screenshot of the problem

share|improve this question
It must be an Excel bug, I cannot reproduce this behaviour in Excel 2007 with your worksheet. Did you install all Office updates? – Adam Ryczkowski Oct 11 '12 at 7:11
As far as I can tell, all Excel 2010 updates are applied. – Stephen Jennings Oct 11 '12 at 16:10

I can replicate this in Excel 2010. In fact, you have the same issue with any named range beginning with either a C or an R.

C and R are also the only single letter named ranges that you cannot have. It displays the following error when trying to create a named range called C: enter image description here

(By contrast a named range called A is fine)

I imagine you cannot name a named range C or R because of the R1C1 reference style. And I wonder if it is Excel's use of this reference style that may be causing issues with any named range beginning with C or R in the chart source.

I would agree with Adam Ryczkowski's comment to your question that this looks like an Excel bug, and that the workaround is as you have done, to use a named range for the chart source that doesn't begin with an R or a C.

share|improve this answer
Ahh, that does make sense. Excellent use of psychic debugging. – Stephen Jennings Feb 26 '13 at 21:15

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