USER MANAGER COMMAND ERROR

Hi, I installed about 20 rb750-gr3 routers with user manager with hotspot and radius, all of them working fine. Now I am configuring a new router with the same configuration and same version of routeros (6.49.:sunglasses: and I getting this error:

[admin@MikroTik] > /tool user-manager
bad command name user-manager (line 1 column 7)

I use command line to generate users from and excel file.
Any idea? Thanks.

check if not install userman pakage

same happening for me, user man packages are installed, how to fix ? pls guide anyone