Hi Maniganda, I have set it in the field properties and not XML. {'required':[('state','in',('ready'))]} But the field does not give an error like "this field is required." I am trying to do it in field properties because it is a custom field and i do not wan to modify too much on the xml code itself. The field is not prompting error when i perform next action, it just stay in the same page. any idea?

{'readonly':[('state','in',('ready'))],'required':true} This consist of two requirements, required and read only. There might be some syntax error. When i seperate this, i get it correct. Is there something wrong with this attrs?

I found that the error message is not prompting out when i am not in editable state. https://dl.dropboxusercontent.com/u/42025188/no_error_prompt.png