How to use solid from plies?

Good afternoon, for my project, I am willing to use the "solid from plies" function in the composite design module. However, after trying many different ways to acces it, the button stays grey and this functionnality cannot be accessed. Could you explain me how tu unlock it? Is it because of the type of part (surface or volume) or the material, or anything else? Please tell me what are the main guidelines. I already checked the help section (User Assistance R2021x - Creating a Solid From Plies (3ds.com)) but it does not answe my questions. Thank you for your answer


3DEXPERIENCE ​​​​​​​Composites Design ​​​​​​​Edu ​​​​​​​