Fixed: 5.2.1

1. Product Version
JUDE/Professional 5.2

2. Description
When checking NOT NULL for Attributes (Except for Primary keys), following
improper behaviors would occur.

1)NOT NULL does not appear in Diagram despite "NULL Option Visibility" is ON.
2)NOT NULL will be checked off automatically once you click on other objects.

3. Solution
To let Attribute have NOT NULL, you need to make the Attribute a Primary Key once then change it back to Attribute again.

1) Go to Property View of Attribute then check [Primary Key].




















2) Check off [Primary Key].




















This solution has one problem. Once Attributes with NOT NULL are created by this way, you won't be able to check off NOT NULL from them. If you want to check off NOT NULL, you have to delete Attribute itself and create another one.