How to prevent a property (e.g. "Project Name") from being blank in E-Notebook 12.1?

How to prevent a property (e.g. "Project Name") from being blank in E-Notebook 12.1?

Please do the following configuration change:

1. Login to E-Notebook as an administrator.
2. Go to Everyone -> Configuration -> Section Types -> Title -> [right-click] -> Section Type Configuration -> Fields -> Metadata -> [on the right side] -> Custom Properties -> Project Name.
3. Select the “Not Blank” checkbox.
4. Close all dialogs.
5. Refresh E-Notebook (F5).

Note that users will be able to save an experiment, switch to another experiment, or close the application with a blank “Project Name”. But they will not be able to do transitions (e.g. “Sign and Close”) until they provide a value for the “Project Name”. Please refer to the application “Help” menu -> E-Notebook User’s Guide -> Working with E-Notebook -> Getting Data into E-Notebook -> Working with Property Lists -> Setting and Editing Values in a Property List.

You also need to have the "Required Non-Blank Properties Transition Listener" for that to work. Please check if you have it, e.g. at

a) Everyone -> Configuration -> Collection Types -> Experiment -> [right-click] -> Collection Type Configuration -> States -> Open -> Transition Types -> Sign and Close -> Transition Listeners -> Non Blank (can have a different name, but the corresponding Implementation should be ENStandard9.RequiredNonBlankTListener).

b) Everyone -> Configuration -> Collection Types -> Experiment -> [right-click] -> Collection Type Configuration -> Commands -> Sign and Close -> Command Listeners -> RequiredNonBlankTListener (can have a different name, but the corresponding Implementation should be ENStandard9.RequiredNonBlankTListener).