AutoCAD Plant 3D

[#1]

Hi,

all of sudden, my short cut menu for Plant 3D is missing when I editing P&ID drawings. I didn't know what I might have done accidently. please tell me what I can do to bring it back. When you edit the P&ID elements, you should be able to see these speical commands only for P&ID. It suddenly disappear. (look at the iamge below, the Plant 3D menu is gray out. I had tried shortcutmenu variables, and set it to 11. doesn't seems to work at all.

Also, not sure if it is related, I used to be able to select the item and hit E key to delete it, but now, it won't work. At the same time with the disappeared shortcut plant 3D menu.