ISBLANK and ISNULL with a Rich Text Field is not working in Validation Rule

Biswajeet   November 15, 2017   No Comments on ISBLANK and ISNULL with a Rich Text Field is not working in Validation Rule

Using ISBLANK or ISNULL with a Rich Text Area field always returns true when used in a Validation Rule.
To check whether a Rich Text Area field is empty, use the LEN function.

LEN (Rich_Text_Field__c) = 0