0 Birth Date filter in Data View results in error 1 Greg Leininger posted 9 Years Ago I have created a Data View where I want to see people who are missing the birth date value. I set a filter where Birth Date Is Blank. Rock gives me this error: INFO: There was a problem with one or more of the filters for this data view... Birth Date Is Blank: String was not recognized as a valid DateTime. So, it looks like the SQL was incorrectly written to where it looks for a blank string in a date field rather than a null value in the date field.