Command "DIM" is missing in 2018 SP3

Hello everyone,
I found something weird.
I have some lisp routines and they worked with 2018 SP2 Pro.
In these routines i work with aligned dimensions so i use the command "dim" and now with SP3 this is no longer possible.
Why o why is this DIM command no longer available, i'm realy depending on it?
Above is alsno known as "Dimension Command Mode"