Generate an AutoNumber based on "Yes" being selected in a drop down
This formula seems to be in error  I get #UNPARSEABLE
=IF([MY FIELD NAME] = "Yes", AUTONUMBER(), "")
It would be even better if I could create the number when a checkmark is selected in another column.
EDIT: I am trying this for the checkbox:
=IF([MY FIELD NAME]@row, AUTO_NUMBER(), "")
My field format is Text/Number
Best Answer

I did have an answer typed out that said you were missing the result in your expression and needed to add = 1 but then I tested it and it worked without. So I learned something new as well!
Answers

Hello,
You will likely need to add an additional column that has the properties of "Auto Number".
With the Auto Number established the following formula will preform as it should:
=IF([MY FIELD NAME]@row = 1, [Auto Number]@row, "")

OK  based on your feedback and some research, it looks like my problem is I can't have more than one auto number per sheet. That is a huge gap that Excel doesn't suffer from.
So if I want to do a work around  I tried to append my current AutoNumber field with "MRC". My expected behavior would be, check the box, then a value would show up in this new field. I created a new text/number field and entered the following:
=IF([Requires MRC Number]@row, [Case Number]@row & "MRC", "")
I still get the #UNPARSEABLE message.

The symbol to join text or cell strings in smartsheet is + not &
Try
=IF([Requires MRC Number]@row, [Case Number]@row + "MRC", "")

Thanks  it also appears as if I was not identifying that the box was checked with this:
=IF([Requires MRC Number]@row = 1,
I'm relearning formulas here and making some basic mistakes. thanks for your input.

I did have an answer typed out that said you were missing the result in your expression and needed to add = 1 but then I tested it and it worked without. So I learned something new as well!

Interesting  I might retry it.
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