Stata 16: Multilevel mixed-effects linear regression model with random effect

[Nelufa Begum]

Hi Stata users,
In Stata 16, I am trying to fit a

multilevel mixed-effects linear regression model but

can't create random effect by using the menu: Statistics > Multilevel mixed-effects models > Linear regression.

Is there any problem with Stata 16?

I have done it before in previous version of Stata.
Regards,
Nelufa