Warning Message

[MLK]

Is there a way to do the following without using VBA:

If a user manually enters a value in a cell (not a list), I would like to
compare this value against a value in another column - and be able to display
a warning message if the criteria is not as expected.

For instance, if a value is entered in column A, then column B and C should
not contain any values - as this impacts connecting formulas. I could just
blank out this information - but this would impact the other calcs.
Therefore, I want to display a message to ensure the user is making the right
entries.

 

[MLK]

Great! Thank you.

MLK --

After you select the input cell, do the following: Click >Data>Validation.
On the 'Settings' tab, click Allow: List, and then select the range of cells
containing your acceptable entries.

HTH