Hi @Anonymous,
I'm sorry that you have this issue.
This command has been available in AutoCAD (LT).
Unfortunately this command is available until AutoCAD 2018 and has been removed in current version.
Please find the details here.
The help files of Map are not updated to show this changes.
Thank you very much for reporting this and I will create change request to change the documentation to meet the correct behavior in AutoCAD Map 3D help.
Kind regards
Brigitte Koesterke
Technical Support Senior Specialist