Autofit error

I'm using Excel 2002.
I just had a macro that has been working for months get an error

Error #: 1004
AutoFit method of Range class failed

This is the section of code that triggered the error.
All the variables are properly dimmed. I have verified that there was no error setting the value. The range is formatted as Number with 3 decimals. All the values are less than 11.

With shCircuits
        Set r = .Range("TeamResults").Columns(iRace)
        r.Value = .Range("TeamPoints").Value
        r.EntireColumn.AutoFit        'Triggers Error
End With

It has been working fine for several months.

Are there any reasons why autofit would fail? Help says it will fail only if r is not a column.
The only thing I can think of is that the width of the sheet may have hit some limit. I am using column IU