In Documentation is
DisplayName of the parent column in the form
This function only work when I use Static Name.
Is this a bug of a feature or the documentation ?
Mar 31, 2011 at 1:35 PM
The columnName does need to be the DisplayName, so I'm not sure what's going on it your case.
However, you're right that the doc wasn't right in that it said "parent column". It should just be "column", as below.
DisplayName of the column in the form
I'm surprised no one has caught this in all this time!