[Manufactured Items Management] I can not generate an EIN on manufacturing elements

Hello everyone,

I tried to generate an EIN on my manufacturing assembly but I was not able to do it.

I created the EIN Formula in the Platform Management (Engineering Definition)

It works on Physical Products in XEN :

But in MFN with a manufacturing element I do not have the "+" with "Request Enterprise Item Number" :

 

Is there a bug or did I miss something?

Best regards

Guillaume Wolff